# Question #939e5

Jul 24, 2017

I got E)

#### Explanation:

Here you need heat to change the phase of your material from solid (ice) to liquid at constant temperature.

The heat will be:

$Q = m {L}_{f}$

where:
$Q =$ is the heat;
$m =$ is the mass;
${L}_{f} =$ is the Latent Heat of Fusion (the heat needed to liquefy one gram of substance); for water it is: ${L}_{f} = 334 \frac{J}{g}$ (from literature)

So we get:

$Q = 15 \times 334 = 5010 J$