Oxygen with mass m = (0.08kg) in V1 volume has transformed into V2 = (V1 / 4) by isothermal compression. Later, oxygen was heated at constant pressure and its volume turned into V3 = (5V2). Plot this process on a p-V graph and calculate the total entropy change. (consider oxygen the ideal gas.) (molar heat capacity of oxygen at a constant volume Cv = (5/2) R)

A food product containing 85% moisture content is being frozen. Estimate the specific heat of the product at -4 ° C when 62% of the water is frozen. The specific heat of the dry product is 2.5 kJ / (kg ° C). it is assumed that the specific heat of water at -10 ° C is the same as the specific heat of water at 0 ° C, and the specific heat of ice follows the function Cp es = 0.0062 Tfrozen + 2.0649. Cp of frozen product =      kJ / kg ° C.