# 4: What is the amount of energy given up by 300 kgs of ethanol that is initially at a saturated vapor condition (1 atm and 78.5 °C), if the ethanol is condensed and subcooled (temp below its boiling point) to a temperature of 15 °C (still at pressure of 1 atm)? Give your answer in units of BTU and Joules. Also, show this process as a line drawn on a qualitative single component P-T phase diagram.

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Introduction and Basic Calculations in Multiphase Systems

Chemical calculations involve material and energy balance calculations which enable engineers to calculate material and energy requirements in various chemical processes. In addition to this, chemical calculations help to study the behavior and properties of gases, liquids, and their mixtures.