**Calorimetry:-** Measuring how much heat we get when we burn 1 mole.

Heat Energy Equation:- q = mcDT. Q is the amount of heat energy in joules. M is the mass of water heated in grams. C is the constant 8.14. DT is the temperature change.

Example:- 12g of pentane (C^{5}H^{12}) raises the temperature of 100cm^{3} of water by 10*C.

Constant = 4.2, Carbon = 12, Hydrogen = 1.

1. Work out the heat given to the water. q = mcDT. q = 100 x 4.2 x 10. q = 4200J.

2. Work out how many moles of fuel were used. n = m/mr. 12/22 = 0.167 mol.

3. 1 mole of pentane = energy/moles. 4200/0.167=25149.701J. DHc = -25.21KJ mol-1.

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