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

1 Answer

The answer is: #33.4kJ#

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

#Q=Lm#

where

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

#L# or #L_(ice)# is the Latent Heat of melt for ice, that is:

#L_(ice)=3.34 · 10^5 J/(kg)#;

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

#m=100g=0.1kg#.

So:

#Q=3.34 · 10^5 J/(kg).0,1kg=33,400J=33.4kJ#