How much energy will it take to melt 100 grams of ice at 0◦C?

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Answer 1 · 2015-01-29T20:27:24

The answer is: $33.4 k J$ $33.4kJ$

To answer to this question it is sufficient to use this equation:

$Q = L m$ $Q=Lm$

where

$Q$ $Q$ is the amount of heat needed to melt the ice (the request of the problem;

$L$ $L$ or $L_{i c e}$ $L_(ice)$ is the Latent Heat of melt for ice, that is:

$L_{i c e} = 3.34 \cdot 10^{5} \frac{J}{k g}$ $L_(ice)=3.34 · 10^5 J/(kg)$ ;

$m$ $m$ is the mass of ice that is to melt, that is:

$m = 100 g = 0.1 k g$ $m=100g=0.1kg$ .

So:

$Q = 3.34 \cdot 10^{5} \frac{J}{k g} .0, 1 k g = 33, 400 J = 33.4 k J$ $Q=3.34 · 10^5 J/(kg).0,1kg=33,400J=33.4kJ$