Substance X Has a Heat of Vaporization of 58 $\to$ X(g)at 1 Atm and 423°C Calculate the Value Of

question 16

Multiple Choice

Substance X has a heat of vaporization of 58.4 kJ/mol at its normal boiling point (423°C) .For the process X(l) $\to$ X(g) at 1 atm and 423°C calculate the value of $\Delta$ S_surr.

• A)0
• B)83.9 J/K mol
• C)138 J/K mol
• D)-83.9 J/K mol
• E)-138 J/K mol

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Definitions:

Currently Attainable Standard

This refers to a standard or benchmark that can be achieved under current operating conditions with reasonable efficiency.

Unfavorable Cost Variance

A variance that occurs when the actual cost exceeds the standard cost.

Favorable Cost Variance

A variance that occurs when the actual cost is less than standard cost.

Revenue Price Variance

The difference between the actual revenue received from selling a product and the expected revenue, based on standard pricing.