Saturday

October 25, 2014

October 25, 2014

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.

**Answer this Question**

**Related Questions**

Calc I - I'm a little confused about this one, it seems different from the rest ...

Chemistry - propane(C^3H^8)is used as a fuel. Propane is a type of hydrocarbon. ...

English - A: You have to come back by four. B: ____________________________. OK...

Science - Hi i have a science exam on tuesday and really need some help to see ...

graphing! - can someone help me? okay so I am given this : (a) y= x-4 (b) y=2-x ...

Chemistry - I have to work out the percentage change in the proportion of carbon...

chemistry - I need to find a balanced chemical equation for the reaction that ...

Algebra - Could someone correct my answers and help with the other problems? 1. ...

Math - 8*2sq+7*(4+1)= ? Can someone explain to me what to after the parenthesis...

physics - In a mall, a shopper rides up an escalator between floors. at the top ...