The initial volume of 0.2 kg of gas was 0.15 m' at a temperature of 288 k and a pressure of 1,03 x 10' nm': after adiabatie compression to 0.054 m', the pressure was found to be 4.18 x 10 n/m determine: i) the constant for this gos i) the molecular weight of this gas ii) the ratio of specific heats iv) the specific heat at constant pressure. v) the specific heat at constant volume.

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.