the heat needed to raise the temperature of a substance

the heat needed to raise the temperature of a substance
What equation do you use to calculate the heat needed to raise the temperature of a substance?

How much heat do you need to raise the temperature of 500 g of gasoline from 0°C to 20°C?
A calorimeter contains 350 g of water at 20°C. You place a hand warmer containing 150 g of liquid sodium acetate inside the calorimeter. When the sodium acetate finishes crystallizing, the temperature of the water inside the calorimeter is 39.4°C. The specific heat of water is 4.18 J/g-°C. What is the enthalpy of fusion (?Hf) of the sodium acetate? , use q = mHf.
What are the steps to correctly writing a thermochemical equation Write an example of a correctly written thermochemical equation.

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