Question

If 20.6 grams of ice at zero degrees Celsius completely change into liquid water at zero degrees Celsius, the enthalpy of phase change will be positive. TRUE FALSE

Answer 1

Answer:

TRUE.

Explanation:

Hello,

In this case, since the fusion enthalpy of ice is +333.9 J/g and the fusion entropy is defined as:

$\Delta _{fus}S=\frac{m*\Delta _{fus}H}{T_{fus}}$

We can compute it considering the temperature (0 °C) in kelvins:

$\Delta _{fus}S=\frac{20.6g*333.9J/g}{(0+273)K}\\\\\Delta _{fus}S=25.2J/K$

Therefore answer is TRUE.

Best regards.