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GEOLOGY 1445 How many calories are required to evaporate 75 grams

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GEOLOGY 1445 How many calories are required to evaporate 75 grams

In my Oceanology course, I am needing to answer the following questions and show how I derived to the answers. I need assistance with answering these 5 questions.

Explain what is meant by water’s latent heat of vaporization.How many calories are required to melt 75 grams of ice at 0oC?  How many calories are required to evaporate 75 grams of water at 100oC? At what temperature does fresh water have the highest density? The density of water at 1oC is the same as the density of water at [2.5oC; 5oC; 7oC; or 12oC]?