Physics and Thermodynamics: Heat, Efficiency, and Energy Calculations

1200 calories of heat is added to a 200-g block of ice at 0°C. What amount of ice melts?

15

Calculate the ideal efficiency of a power plant that runs between temperatures 600 K and 400 K.

33.33

1.0 liter of 20°C water is mixed with 4 liters of 40°C water. What will be the temperature of this mixture?

36

A 100-g iron bar at 100°C is placed in 200 g of water at 20°C. If the specific heat capacity of iron is 0.11 cal/g°C, to what final temperature will the iron bar cool?

24.17

One hundred joules of heat is added to a system that performs 60 joules of work. The internal energy change of the system is

40

What amount of energy is needed to change 1.0 kg of 0°C ice to 10°C?

375,860

At what temperature would the molecules of a gas have twice the average kinetic energy they have at a 20°C room temperature?

313.15