What is a calorimeter? Name the material of which it is made of. Give two reasons for using the material stated by you.

4) A ground source heat pump heats a building by extracting heat from the ground and pumping it into the building. Define: Qc = heat extracted from the ground, Qn= heat pumped into the building, W = electric energy used by the heat pump, Tc= temperature of the ground, T = temperature of building (Qc, Qn, and W are positive by definition). Assume Tr > Tc. a) Draw a diagram showing energy flow in and out of the heat pump. b) Write a general expression for the change AS in the entropy of the "universe", that is the heat pump plus the cold and hot reservoirs, in terms of the quantities defined above. Now assume ideal (reversible) operation, and take Te= 10 °C and Tp= 20 °C. What is the coefficient of performance (ČOP) of the heat pump? By what factor would this change if we had Tc = 0 °C instead?

When a substance absorbs or releases heat, the ______ changes. A.Potential energy  B.Internal energy C.Spring Potential Energy  D.Kinetic energy

Two equal mass liquids, initially at the same temperature, are heated for the same time over the same stove. You measre the temperatures and find that one liquid has a higher temperature than the other. Which liquid has the higher specific heat?     The cooler one.     The hotter one.     Both are the same.     Not enough information.