🤓 Based on our data, we think this question is relevant for Professor de Laat's class at University of Guelph.

We’re being asked to **calculate the amount of energy** released by freezing **42.5 g of water**.

Recall that during a phase transition, the ** temperature is constant**.

Also note that freezing is an ** exothermic process**, which means q is negative (–).

The ** amount of energy (q)** needed to freeze a given mass is calculated using:

$\overline{){\mathbf{q}}{\mathbf{=}}{\mathbf{m}}{\mathbf{\times}}{{\mathbf{\Delta H}}}_{{\mathbf{freezing}}}}$

where:

**m** = mass (in g)

**ΔH _{freezing}** = heat of freezing (in J/g)

How much energy is released when 42.5 g of water freezes?