Isobaric Processes: Interactive Learning Quizzes for Thermodynamics

Question 1

In an isobaric process, which parameter stays the same?

Accepted Answer

Pressure

Answer

Volume

Answer

Internal Energy

Question 2

In an isobaric process, the system's pressure:

Accepted Answer

Remains constant

Answer

Increases

Answer

Decreases

Answer

Varies erratically

Question 3

During isobaric heating, the system's volume:

Accepted Answer

Increases

Answer

Remains constant

Answer

Decreases

Answer

Becomes zero

Question 4

Which of the following is NOT a characteristic of an isobaric cooling process?

Accepted Answer

Temperature increases

Answer

Pressure remains constant

Answer

Heat is transferred out of the system

Answer

Volume decreases

Question 5

Which of the following processes can be represented by an isothermal line on a P-V diagram?

Accepted Answer

Isothermal process

Answer

Isobaric process

Answer

Isochoric process

Answer

Adiabatic process

Question 6

An ideal gas undergoes an isobaric process. Which of the following statements is true about the change in internal energy of the gas?

Accepted Answer

It remains constant

Answer

It increases

Answer

It decreases

Answer

It depends on the specific heat of the gas

Question 7

In an isobaric process, the specific heat at constant pressure, Cp, is related to the change in enthalpy by:

Accepted Answer

Cp = dH/dT

Answer

Cp = dH/dV

Answer

Cp = dT/dH

Answer

Cp = dV/dH

Question 8

In an isobaric process, which variable remains constant?

Accepted Answer

Pressure

Answer

Volume

Answer

Temperature

Answer

Internal energy

Question 9

During isobaric heating of an ideal gas, what happens to its volume?

Accepted Answer

Increases

Answer

Decreases

Answer

Remains constant

Answer

Becomes zero

Question 10

Which equation represents an isobaric process?

Accepted Answer

PV = constant

Answer

TV = constant

Answer

PV^n = constant

Answer

TV^n = constant

Question 11

Which factor does NOT affect the change in internal energy during an isobaric process?

Accepted Answer

Change in pressure

Answer

Initial temperature

Answer

Final temperature

Answer

Specific heat capacity

Question 12

Which graph represents an isobaric process on a PV diagram?

Accepted Answer

A horizontal line

Answer

A vertical line

Answer

A parabola

Answer

A hyperbola

Question 13

A gas undergoes an isobaric process from state 1 to state 2. If the initial volume is V1 and the final volume is V2, calculate the change in volume.

Accepted Answer

V2 - V1

Answer

V1 - V2

Answer

V1 * V2

Answer

V1 / V2

Question 14

During the isobaric cooling of an ideal gas, what occurs?

Accepted Answer

Heat is removed from the gas

Answer

Heat is added to the gas

Answer

No heat transfer occurs

Answer

The process is adiabatic

Question 15

Which of the following graphs best represents an isobaric process?

Accepted Answer

P vs. V (linear, positive slope)

Answer

P vs. T (nonlinear, negative slope)

Answer

V vs. T (hyperbolic)

Answer

T vs. P (vertical line)

Question 16

Consider an isobaric process involving 2 moles of an ideal gas. The initial volume is 10 L and the final volume is 20 L. If the initial temperature is 300 K, calculate the final temperature.

Accepted Answer

600 K

Answer

300 K

Answer

150 K

Answer

900 K

Question 17

Which assumption underpins the analysis of isobaric processes?

Accepted Answer

Pressure remains constant

Answer

Temperature remains constant

Answer

Volume remains constant

Answer

Heat capacity remains constant

Question 18

In engineering systems, isobaric processes are widely used. Explain how isobaric processes are practically applied in systems like engines, heat pumps, and compressors.

Accepted Answer

In engines, isobaric expansion is used to generate power by controlling gas expansion.

Accepted Answer

Heat pumps use isobaric processes to efficiently transfer heat for heating or cooling.

Accepted Answer

Compressors use isobaric compression to increase gas pressure for various applications.

Answer

Isobaric processes have no practical applications in engineering systems.

Question 19

In an isobaric process, which property remains constant?

Accepted Answer

Pressure

Answer

Volume

Answer

Temperature

Answer

Internal Energy

Question 20

Which of the following is NOT a true statement for an isobaric process?

Accepted Answer

Work done is equal to the change in internal energy

Answer

Pressure is constant

Answer

Temperature varies inversely with volume

Answer

Heat transfer can change internal energy

Question 21

Consider an isobaric process where the heat capacity of the gas is constant. If the initial and final temperatures are T1 and T2, respectively, the change in internal energy is:

Accepted Answer

C * (T2 - T1)

Answer

C * (T1 + T2)

Answer

C / (T2 - T1)

Answer

C / (T1 + T2)

Question 22

In an isobaric process, the heat transferred to the system is used to:

Accepted Answer

Increase both internal energy and do work

Answer

Increase internal energy only

Answer

Do work only

Answer

Decrease both internal energy and do work

Question 23

In an isobaric process, which parameter remains constant?

Accepted Answer

Pressure

Answer

Volume

Answer

Temperature

Answer

Entropy

Question 24

During isobaric heating, what happens to the volume of an ideal gas?

Accepted Answer

Increases

Answer

Decreases

Answer

Remains constant

Answer

Becomes zero

Question 25

Which of the following is NOT a consequence of isobaric cooling?

Accepted Answer

Increase in pressure

Answer

Decrease in volume

Answer

Decrease in temperature

Answer

Condensation

Question 26

An ideal gas undergoes an isobaric process from state (1) to state (2). If the initial volume is V1 and the final volume is V2, what is the ratio of V2/V1?

Accepted Answer

T2/T1

Answer

T1/T2

Answer

P2/P1

Answer

P1/P2

Question 27

Which of the following statements about isobaric processes is true?

Accepted Answer

Heat transfer occurs at constant pressure.

Answer

Work done is equal to the change in internal energy.

Answer

Entropy remains constant.

Answer

Adiabatic processes are a type of isobaric process.

Question 28

A piston-cylinder system containing an ideal gas is heated isobarically from 25°C to 125°C. If the initial volume is 1.5 m3, what is the final volume?

Accepted Answer

2.5 m3

Answer

1.5 m3

Answer

3.5 m3

Answer

0.5 m3

Question 29

In an isobaric process, the heat capacity at constant pressure is defined as:

Accepted Answer

C = dQ/dT

Answer

C = dU/dT

Answer

C = dW/dT

Answer

C = dS/dT

Question 30

In an isobaric process, which variable remains constant?

Accepted Answer

Pressure

Answer

Volume

Answer

Temperature

Answer

Internal energy

Question 31

During isobaric heating of an ideal gas, what happens to its volume?

Accepted Answer

Increases

Answer

Decreases

Answer

Remains constant

Answer

Becomes zero

Question 32

Which of the following equations represents the work done during an isobaric process?

Accepted Answer

W = P(V2 - V1)

Answer

W = ∫PdV

Answer

W = Q

Answer

W = ΔU

Question 33

Which of the following is not a characteristic of an isobaric process?

Accepted Answer

Constant volume

Answer

Constant pressure

Answer

Constant temperature

Answer

Heat transfer

Question 34

An ideal gas is enclosed in a cylinder with a movable piston. The gas is cooled at constant pressure. Which of the following statements is true?

Accepted Answer

The piston moves inward, decreasing the volume

Answer

The piston moves outward, increasing the volume

Answer

The piston remains stationary

Answer

The gas escapes from the cylinder

Question 35

In an isobaric process, how is the change in internal energy related to the work done?

Accepted Answer

The change in internal energy is equal to the negative of the work done.

Answer

The change in internal energy is equal to the work done.

Answer

The change in internal energy is independent of the work done.

Answer

The work done is equal to the change in volume multiplied by the pressure.

Question 36

In an isobaric process, how does volume behave in relation to temperature?

Accepted Answer

Volume increases as temperature increases.

Answer

Volume decreases as temperature increases.

Answer

Volume remains constant despite temperature changes.

Answer

The relationship between volume and temperature cannot be determined from the given information.

Question 37

What defines an isobaric process?

Accepted Answer

The pressure remains constant throughout the process.

Answer

The volume remains constant throughout the process.

Answer

The energy of the system remains constant.

Answer

The temperature remains constant throughout the process.

Question 38

When a system undergoes isobaric heating, what happens to its volume?

Accepted Answer

The volume increases.

Answer

The pressure remains constant.

Answer

The temperature increases.

Answer

The volume decreases.

Question 39

Which of these is NOT a characteristic of an isobaric process?

Accepted Answer

The temperature remains constant.

Answer

The pressure remains constant.

Answer

The volume can change.

Answer

Heat transfer can occur.

Question 40

What is the specific heat capacity relevant to an isobaric process?

Accepted Answer

Cp (specific heat capacity at constant pressure).

Answer

C (generic heat capacity, not specific to any process).

Answer

Cv (specific heat capacity at constant volume).

Question 41

In an isobaric process, which of the following thermodynamic properties remains constant?

Accepted Answer

Pressure

Answer

Volume

Answer

Internal energy

Answer

Temperature

Question 42

During isobaric heating of an ideal gas, what happens to its volume?

Accepted Answer

Increases

Answer

Decreases

Answer

Remains constant

Question 43

Which of the following expressions represents the work done during an isobaric process?

Accepted Answer

P * ΔV

Answer

T * ΔP

Answer

V * ΔP

Answer

P * ΔT

Question 44

Which of the following is NOT a defining characteristic of isobaric processes?

Accepted Answer

Entropy remains constant

Answer

Volume changes

Answer

Heat is transferred

Answer

Pressure remains constant

Question 45

Consider an isobaric process on an ideal gas. Which of the following graphs best represents the relationship between pressure and volume?

Accepted Answer

Horizontal line

Answer

Downward sloping line

Answer

Upward sloping line

Answer

Vertical line

Question 46

In an isobaric process, which variable remains constant throughout the process?

Accepted Answer

Pressure

Answer

Volume

Answer

Temperature

Answer

Internal energy

Question 47

During isobaric heating, what happens to the volume of an ideal gas?

Accepted Answer

It increases

Answer

It remains constant

Answer

It fluctuates unpredictably

Answer

It decreases

Question 48

A closed system containing an ideal gas undergoes isobaric cooling. What happens to the internal energy of the system?

Accepted Answer

It decreases

Answer

It increases

Answer

It remains constant

Answer

It becomes zero

Question 49

Which of the following equations represents the work done by a system during an isobaric process?

Accepted Answer

W = P * (V2 - V1)

Answer

W = 1/2 * k * (x2^2 - x1^2)

Answer

W = n * R * (T2 - T1)

Answer

W = (P2 * V2 - P1 * V1)

Question 50

A gas expands isobarically from a volume of 2 m³ to 5 m³ at a constant pressure of 3 atm. Calculate the work done by the gas in kilojoules (kJ).

Accepted Answer

90.42 kJ

Answer

30.14 kJ

Answer

150.7 kJ

Answer

60.28 kJ

Question 51

What type of diagram is typically used to represent isobaric processes graphically?

Accepted Answer

P-V diagram

Answer

H-S diagram

Answer

X-Y diagram

Answer

T-S diagram

Question 52

Which of the following statements about isobaric processes is NOT true?

Accepted Answer

The temperature always remains constant.

Answer

The pressure remains constant.

Answer

Heat transfer can occur during the process.

Answer

Work can be done by the system.

Question 53

A gas is heated isobarically from 27°C to 127°C. If the initial volume is 1 L, what is the final volume?

Accepted Answer

1.5 L

Answer

1 L

Answer

2 L

Answer

0.67 L

Question 54

In an isobaric process, the heat transfer (Q) and work done (W) can be characterized as follows:

Accepted Answer

Q can be positive or negative, while W is always positive.

Answer

Q is always positive, while W is always negative.

Answer

Q and W are always positive.

Answer

Q is always negative, while W is always positive.

Question 55

A rigid container is filled with a gas and then heated. What type of thermodynamic process does the gas undergo?

Accepted Answer

Isochoric

Answer

Adiabatic

Answer

Isothermal

Answer

Isobaric