Agas with a specific heat ratio (k) of 1.60 has an initial pressure of 200 kpa, a and initial temperature of 60°c. when 14.14 kj of heat is added to the gas at constant pressure, its temperature rises to 279°c, what are the initial and final volumes of the gas? [note: heat = mass x specific heat x temperature rise]

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.