What is the pressure of R-134a vapor after it exits the condenser at 80°F?

To determine the pressure of R-134a vapor after it exits the condenser at 80°F, it's essential to refer to the pressure-temperature relationship of R-134a, commonly found in refrigerant pressure-temperature charts. At 80°F, the saturation pressure of R-134a is approximately 87 psig.

When R-134a exits the condenser, it is in a liquid state, and the pressure at which it transitions from vapor to liquid is indicative of the saturation pressure at that temperature. Since the defined conditions specify the temperature as 80°F, which is tied to the saturation pressure located in the pressure-temperature chart, the value of 87 psig aligns perfectly with these parameters.

Thus, recognizing that the pressure after exiting the condenser is determined directly by the saturation pressure at that specific temperature confirms that 87 psig is the accurate answer.