The accompanying graph represents the theoretical relationship between the volume and the temperature of a gas under constant pressure. image according to this graph, the volume of the gas is (5 points) select one: a. directly proportional to the square of the temperature b. directly proportional to the temperature c. inversely proportional to the temperature d. inversely proportional to the square of the temperature

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)