Question

the molar heat capacity of ice is 37 and the molar heat capacituy of liqyid water is 76. what can be concluded about the relatice magnitudes fo the heat of fusion of ice at 263 k

Answer 1

Answer:

ΔH 263 < ΔH 273

Explanation:

From the given information

According to Kirchoff law:

$\Delta H_2 = \Delta \ H_1 + \Delta \ (c_p) ( \Delta T)$

$\Delta H_2 = \Delta \ H_1 + (76-37) \times ( 273 - 263)$

$\Delta H_2 = \Delta \ H_1 + (39) \times (10)$

$\Delta H_2 = \Delta \ H_1 + 390$

Thus, $\Delta H_2$ at 273 is greater than $\Delta \ H_1$ at 263

∴

ΔH 263 < ΔH 273