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

TRUE.

Step-by-step 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=(m*\Delta _(fus)H)/(T_(fus))`

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

`\Delta _(fus)S=(20.6g*333.9J/g)/((0+273)K)\\\\\Delta _(fus)S=25.2J/K`

Therefore answer is TRUE.

Best regards.