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

If someone could see if I have the right answers, and if I don't maybe give me some hints on what to do to get to the right answerr, please.

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 ...

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

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

Chemistry - Hi, please can someone tell me if this is the right number of ...

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

chemistry - How do you calculate the theoretical cell voltage? 1) Zn|Zn^+2 (1M...

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

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

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

enviromental studies - please could someone help me with my enviro homework im ...