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January 31, 2015

January 31, 2015

Posted by **Anonymous** on Tuesday, November 10, 2009 at 5:24pm.

1. Calculate the heat required to raise the temperature of 150g of water by 25.0°C. [For pure water specific heat capacity=4.18Jg^-1K^-1]

Answer=15.675kJ ? (using mass*specific heat capacity*change in temp?)

2. The calorimeter constant of a flame calorimeter is 5.83*10^3JK^-1. The complete combustion of 3.20g of methanol CH3Oh raises the temperature by 12.3°C. Calculate the enthalpy change for the combustion of 1.00mol of methanol.

Answer: bit stuck here. not sure what to or how to include all the numbers.

2341.51kJ ? (by finding out the enthalpy change, then the molar mass of methanol and the moles, then using the moles to divide by the enthalpy change?)

- chemistry -
**DrBob222**, Tuesday, November 10, 2009 at 6:22pm#1 is ok.

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