How much heat is required to melt 5 grams of ice at 0 degrees Celsius to liquid water at 0 degrees Celsius

Question

I do not understand heat calculations I understand how to do it if there are different temperatures but how do I do it if they are different states of matter at the same temperature I have tried other videos and websites but find different answer to each I need to turn this in tomorrow for a grade and don’t understand it 

Answer 1

The important thing to realize/understand when there is a phase change (change in state), there is NO CHANGE in temperature.  All of the heat goes to changing the state, and not to altering temperature.  So, as pointed out by Edward A in his answer, the heat used going from solid water (ice) to liquid water is referred to as the latent heat of fusion and all that heat goes into melting the ice. No change in temperature.  Similarly, going from liquid to gas is referred to as latent heat of vaporization, and again there is no change in temperature.

 

For the calculations, you simply multiply the mass x the latent heat to get heat (joules usually), and add this to other changes that you've calculated when there is a change in temperature.

Answer 2

Kayla, you’ve put your finger on the issue: what heat is required to change state from ice to water? 

 

The concept is called “latent heat of melting ice“. Look it up.