Initial state: a softball is at rest in the hand of a softball player. final state: shortly after being thrown, the softball is in motion at the highest point along its trajectory. notes: the system includes the ball and earth. air resistance is negligible. the player threw the ball upward at an angle. system: player-ball-earth

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).