10.0 g of a fuel are burned under a calorimeter containing 200.0g of H2O. The temperature of the water increases from 15.0 C to 55.0 C. calculate the total heat produced in Joules adn the heat of combustion per gram of fuel
2007-03-12 14:12:17 · 1 answers · asked by kr 1 in Science & Mathematics ➔ Chemistry
To calculate the heat gained by the water, use q = m c DT where m is the mass of the water, c is the specific heat of water and DT is the temperature change of the water. Since the water GAINED heat, your answer should be a positive number of joules.
When the fuel was burned, it RELEASED the amount of heat that the water absorbed, and so the heat released by the fuel would be the same number of joules with a negative sign.
The heat of combustion of the fuel would be that number of joules divided by 10 grams.
2007-03-12 14:21:02 · answer #1 · answered by hcbiochem 7 · 0⤊ 0⤋