How much energy is needed to heat 500 g of water at 50 degrees C to 70 degrees C?

1 Answer
anor277
May 5, 2018

Well what is the heat capacity of water in #J*K^-1*g^-1#?

Explanation:

You are heating a #200*g# mass of water by #20*K#...there are NO phase changes. The heat capacity of water is #4.18*J*K^-1*g^-1#...

We are ADDING energy so we take the product...

#500*gxx4.18*J*K^-1*g^-1xx40*K~=+8.4*kJ#?

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