1. 500J of work are done on a system in a process that decreases the system’s thermal energy by 200J. How much energy is transferred to or form the system as heat?

A gas is compressed inside a cylinder with an average force of 40 N acts to move the piston 0.20 m. If no heat has time to move into or out of the gas, what is the change in internal energy of the gas?

What is the change in internal energy of a system which does 4.50×105 J of work while 3.00×106 J of heat transfer occurs into the system, and 8.00×106 J of heat transfer occurs to the environment

The motor that drives a refrigerator produces 151 W of useful power. The hot and cold temperatures of the heat reservoirs are 20.0°C and -5.00°C. What is the maximum possible amount of ice it can produce in 2.00 h from water that is initially at 8.00°C? Latent heat of fusion of ice is 333700 J/kg and specific heat capacity of water is 4186 J/(kg-K). kg

A certain coal-fired power plant has a rated power capacity of P = 850 MW. The output of this plant is W = 0.26QH, where QH is the energy input as heat from the hot reservoir. a. If the power plant operates for a full day at its rated capacity, how much energy QH in MJ is needed?  b. If, on average, one ton of coal contains Q = 25 GJ of energy, how many tons nH of coal would the plant need to operate for a day at its rated capacity?  c. How many tons nC of this coal is exhausted as wasted heat to QC in a single day?

An air-filled cylinder with a movable piston has a heat reservoir in contact with it. The heat reservoir transfers 850 ) of energy into the cylinder. Due to the energy transfer, the piston does 437 J of work on the environment. What is the change in internal energy of the system? A 1.9J 413 J 1287 J D 371 000 J

An electric motor running a large copier draws 2.7 kW. The motor runs 3 hours in a day. How much heat is produced in the space PER DAY as a result of the copier’s operation? Convert the result to Btu.

How much heat is needed to produce 13 J of energy from a heat engine with an efficiency of 0.3? A 3.9 J 10 J 12.7 J D 43 J

A model steam engine of 1.00 kg mass pulls eight cars of 1.00 kg mass each. The cars start at rest and reach a velocity of6.20 m/s in a time of 3.00 s while moving a distance of 4.50 m. During that time, the net heat input is 128 J. What is the change in the internal energy of the engine? In Joules

An electrical power station requires 1.05 × 1014 J of heat transfer into the engine and has an efficiency of 42 %. a.) How much heat transfer occurs to the environment by the electical power station in J?  b.) What is the ratio of heat transfer to the environment to work output?  c.) How much work is done in J?