Did I do this correctly?

Question

If 5g of butter are burned in a calorimeter containing 1 L of water (density of water is 1g/mol), the temperature of the water rises from 21°C to 66°C. determine the amount of energy that is transferred to the water.

Q = mCT
=(1005g)(4.184J/g•°C)(66°C - 21°C)
=189221.4J

I think I'm wrong though... Will you help please?

Answer 1

There's a typo in your original statement; the density of water is 1 g/mL, not per mole. Your formula is correct, but I see another mistake because you gave the mass of the water as 1005 g. However, (1 L)(1 g/mL) = (1000 mL)(1 g/mL) = 1000 g, not 1005 g. Aside from that, it's fine. I get Q = mCT = (1000 g)(4.184 J/g*C)(66 C - 21 C) = 188280 J = 188 kJ.