Chemistry: The Central Science (13th Edition)

Published by Prentice Hall

Chapter 19 - Chemical Thermodynamics - Additional Exercises - Page 852: 19.93

Answer

$T\Delta S$ is positive and greater than $\Delta H$.

Work Step by Step

If $NH_4NO_3(s)$ dissolves spontaneously in water, $\Delta G=\Delta H-T\Delta S$. Basic properties of mathematics tell is that if $\Delta G$ is negative and $\Delta H$ is positive then $T\Delta S$ must be positive and greater than $\Delta H$.

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