Question

The residential rate for natural gas is about $15 per thousand cubic foot. Burning one cubic foot of natural gas releases about 1080 kJ of heat. How much would it cost, in US$, to heat the water in a 25,000 gallon swimming pool from 52*F to 78*F, assuming all of the heat from the burning natural gas went towards warming the water? (1 gal = 3.785L ; specific heat of water = 4.184 J/g*C ; water density = 1.00g/mL).

Answer 1