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# Thermochemistry question! Don't know how to do part b, will award best answer?

Solar energy can heat cold water for domestic hot water tanks,

a) What quantity of heat is provided by solar energy if 100.0kg of water is heated from 10.0°C to 45.0°C?

b) Normally natural gas us used to heat water, if natural gas costs 0.351¢ per MJ calculate how much money a person would save by using solar energy rather than natural gas if the tank in part a were heated 1500 times in one year.

Answer:

a) 1.46 x 10^7 J

b) $77.0

### 1 Answer

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- az_lenderLv 78 months ago
"The tank in part (a)" is not FREE, so the question is stupid.

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