How much heat is required to change the temperature of 150 g of water by 20 degrees celsius?

The specific heat capacity for water is 4.184 J/g°C. This means that 4.184J of heat is required to raise 1g of H₂O by 1⁰C. In this problem, you have 150g of water and want to increase the heat by 20°C. 

The equation you will want to use for this problem is:
 Cs = (q÷(m×Δt))

Cs = specific heat capacity
q = heat
m = mass
Δt = change in temperature

Plug your variables into the equation:

4.184 = (q÷(150×20))

Next, solve for q. This will be your answer.

Hope this helps you. 

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Precipitate, and gas