termodynamics

Open Ended

NIM / ID

Multiple Choice

What is the definition of 'System' in the context of the universe?

• A part of the universe being studied

• Everything outside the system

• The focus of the study

• A portion of the environment

Multiple Select

What are the three types of thermodynamic systems?

• Open System

• Closed System

• Isolated System

• Dynamic System

Multiple Choice

What are the differences between extensive and intensive properties?

• Extensive properties depend on the amount of matter, while intensive properties do not.

• Intensive properties depend on the amount of matter, while extensive properties do not.

• Both extensive and intensive properties depend on the amount of matter.

• Extensive properties are always larger than intensive properties.

Fill in the Blanks

Multiple Choice

What does the equation ΔU = Q - W represent in thermodynamics?

• Change in internal energy

• Heat absorbed by the system

• Work done by the system

• Heat released by the system

Multiple Choice

110 Joule of heat is added to a gaseous system, whose internal energy is 40 J.

Then the amount of external work done is

• 150 J

• 70 J

• 110 J

• 40 J

Multiple Choice

Calculate the change in internal energy (ΔU) given that W = -100 J and Q = 150 J. What is ΔU?

• 50 J

• 150 J

• 250 J

• -250 J

Multiple Choice

Given the values Q = 3000 J and W = 2500 J, calculate ΔU. What is the value of ΔU?

• 100 J

• 500 J

• 2000 J

• 3000 J

Multiple Choice

A system undergoes an isobaric process. The system has 100 J of work done on it, and it absorbs 150 J of heat. What is the value of ΔU (the change in internal energy)?

• 250 J

• 100 J

• 150 J

• -50 J

Multiple Choice

What are the four types of thermodynamic processes?

• Adiabatic

• Isothermal

• Isobaric

• Isochoric

Multiple Choice

What is the relationship between heat and change in internal energy in an isochoric process?

• Heat is equal to work done

• Heat equals change in internal energy

• Heat is independent of internal energy

• Heat is always negative

Multiple Choice

What is the formula for work done in an isobaric process?

• W = pΔV

• W = ΔU + qp

• W = qp - pΔV

• W = p + ΔV

Multiple Choice

What is the relationship between heat (Q) and work (W) in an isothermal process?

• Q = W

• Q > W

• Q < W

• Q = 0

Multiple Choice

What is the work done in an isothermal process for an ideal gas?

• W = P(Vf - Vi)

• W = 0 J

• W = nRT ln(Vf / Vi)

• W = (3/2)nR(Ti - Tf)

Multiple Choice

What is the work done (W) calculated using the formula W = P.ΔV?

• 2.01 x 10^5 Pa

• 5.025 x 10^5 J

• 4.5 m^3

• 2 m^3

Fill in the Blanks

Multiple Choice

One mole of an ideal gas is taken through a closed cycle represented by this PV diagram. If going from point 1 to 2 is isothermal, what is true about the change in internal energy and heat going from point 2 to 3?

• ΔU = 0, Q > 0

• ΔU > 0, Q > 0

• ΔU < 0, Q < 0

• ΔU < 0, Q > 0

Multiple Choice

Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C. This would violate the

• first law of thermodynamics.
• second law of thermodynamics.
• both of the above
• none of the above

Multiple Select

A sample of an ideal gas can be taken from state A to state B through one of two processes $$A\rightarrow Y\rightarrow B\ or\ A\rightarrow X\rightarrow B$$ , as shown in the pV diagram. Which of the following will be the same for both processes?

• The average kinetic energy of the gas

• The temperature of the gas at the end of the process

• The thermal energy transferred to the gas by heating

• The work done on the gas

Poll

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