Chemistry

Problem

Which of the following processes releases the greatest magnitude of heat (most negative

q

) at

1\,\text{atm}

? (A) Condensing

10\,\text{g}

of steam at

100\,^{\circ}\text{C}

(B) Freezing

20\,\text{g}

of liquid water at

0\,^{\circ}\text{C}

5.0\,\text{g}

of steam at

100\,^{\circ}\text{C}

(D) Freezing

40\,\text{g}

of liquid water at

0\,^{\circ}\text{C}

(For water:

\Delta H_{\text{vap}} = 40.7\,\text{kJ\,mol}^{-1}

and

\Delta H_{\text{fus}} = 6.0\,\text{kJ\,mol}^{-1}

.) a) Process D b) Process B c) Process A d) Process C