83.6 kJ of heat is supplied to 2 kg of water (c =4160 J/kg° C). What is the increase in the temperature of water?
An engine takes 8x105 J of heat and expels 6x105 J of heat in each cycle of operation. What is its efficiency?
How much heat is required to increase the temperature of 2 kg water from 25° C to 30° C?
When heat is added to a system, its internal energy increases by 5 J. What is the amount of heat added to a system if the system does 18 J of work?