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Applying the Energy BalanceA closed, rigid tank contains
Chapter 3, Problem 48P(choose chapter or problem)
A closed, rigid tank contains Refrigerant 134a, initially at \(100^{\circ} \mathrm{C}\). The refrigerant is cooled until it becomes saturated vapor at \(20^{\circ} \mathrm{C}\). For the refrigerant, determine the initial and final pressures, each in bar, and the heat transfer, in \(\mathrm{kJ} / \mathrm{kg}\). Kinetic and potential energy effects can be ignored.
Questions & Answers
QUESTION:
A closed, rigid tank contains Refrigerant 134a, initially at \(100^{\circ} \mathrm{C}\). The refrigerant is cooled until it becomes saturated vapor at \(20^{\circ} \mathrm{C}\). For the refrigerant, determine the initial and final pressures, each in bar, and the heat transfer, in \(\mathrm{kJ} / \mathrm{kg}\). Kinetic and potential energy effects can be ignored.
ANSWER:Step 1 of 4:
Consider a rigid container having refrigerant 134a. The matter inside the container is cooled down from the initial temperature. We are going to find the pressure values in each case and the heat transfer in kJ/kg.
The initial temperature T1 = 100°C
The final temperature T2 = 20°C