Thermodynamics

Which concept does the first law of thermodynamics describe?

• conservation of mass

• conservation of energy

• work-heat equivalence

• conservation of momentum

What occurs when Q = 0, so that the first law of thermodynamics takes the form of
U =
W?

• an isovolumetric process

• an isothermal process

• an adiabatic process

• an isolated system

What occurs when W = 0, so that the first law of thermodynamics takes the form of
U = Q?

• an isovolumetric process

• an isothermal process

• an adiabatic process

• an isolated system

What process occurs when Q = W = 0, so that the first law of thermodynamics takes the form of
U = 0?

• an isovolumetric process

• an isothermal process

• an adiabatic process

• an isolated system

What occurs when
U = 0, so that the first law of thermodynamics takes the form of Q = W?

• an isovolumetric process

• an isothermal process

• an adiabatic process

• an isolated system

A steam engine takes in 2750 J of energy as heat, gives up 1550 J of energy as heat to its surroundings, and does 850 J of work. What is the change in the internal energy of the engine?

• 5150 J

• 3450 J

• 2050 J

• 350 J