4.) A material of mass m is heated using 5.00 calories of heat and its temperature rises by one degree Celsius. No phase changes occur. How much heat will be required to raise the temperature of the material by 5.00 degrees Celsius assuming no phase changes occur?   a. 5.00 calories   b. 1.00 calories   c. 25.0 calories   d. zero calories   e. 10.0 calories

f the temperature increases  then what is the temperature rise in __________,     A. 1.0 degree    B. 1.8 degree    C.  1/1.8 degree

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?

A helium gas tank is placed outside for 24 hours during the hot summer season. This process is A. isothermal. B. isobaric. C. adiabatic. D. none of them above. adiabatic.isobaric. none of them.isothermal.