Question 4 (1 point) Material selection is a critical element of sustainable design. Sustainable materials are:
require less energy, resources, and affect on the environment to process and handle
are recyclable and or renewable
are less hazardous and toxic
none of the above
a through a
Question 5.11 noint)

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.