B.4.2 4 thermodynamic processes

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and

• mass
• work done
• force
• pressure

The first law of thermodynamics is a restatement of the

• Zeroth law of thermodynamics
• law of heat addition
• principle of entropy
• conservation of energy

Process B on the PV diagram is an ______________ process.

• adiabatic

• isobaric

• isochoric

• isothermal

A thermodynamic system where no exchange of heat takes place between system and surrounding is...

• Isothermal process

• Adiabatic process

• Isobaric process

• Isochoric process

What does the "U" stand for the formula ∆U = Q + W

• Heat
• Temperature
• Work
• Internal energy

When applying the first law of thermodynamics to a system, when is heat a positive quantity?

• when the system does work
• when the system has work done on it
• when the system absorbs heat
• when the system loses heat
• when no work is done either on the system or by the system

A thermodynamic system where no exchange of heat takes place between system and surrounding is...

• Isothermal process

• Adiabatic process

• Isobaric process

• Isochoric process

Heating a closed, steel container is an example of an

• Adiabatic process

• Isovolumetric process

• Isothermal process

• Isobaric process

For an isovolumetric process, which of the following statements is correct?

• a. Work, heat, and internal energy all undergo changes.

• b. Work and heat balance each other, so that there is no change in internal energy.

• c. No energy is transferred as heat; internal energy change is due to work.

• d. No work is done; internal energy change is due to heat.

Symbol that indicates that energy is released.

• U

• Q

• -Q

• W