Question

The entropy of vaporization of a liquid is 58 JK\textsuperscript{--1mol\textsuperscript{--1}. If 100 g of its vapour condenses at its boiling point of 123$^\circ$C, the value of entropy change for the process is (Molar mass of the liquid = 58 g mol\textsuperscript{--1})}

• A. --100 JK\textsuperscript{--1}
• B. 100 JK\textsuperscript{--1}
• C. --123 JK\textsuperscript{--1}
• D. 123 JK\textsuperscript{--1}
• E. 1230 JK\textsuperscript{--1}

Hint:

Phase change problems often contain "distractor" information. Here, the boiling point (123$^\circ$C) is irrelevant because the entropy change per mole is already provided directly!

Answer 1

The Correct Option is A