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Topic: Change in enthalpy.  (Read 3893 times)

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skeemask

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Change in enthalpy.
« on: November 10, 2005, 07:47:05 PM »
I need some help on this problem. I don't know how to start.

Consider the following reaction:
CH4(g) + 2O2(g) ---> CO2(g) + 2H2O (l)          
delta H = -891 kJ

Calculate the enthalpy change in this case:

1.00 x 103  L methane gas at 740 torr. and 25o C is burned in excess oxygen.  
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Offline mike

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Re:Change in enthalpy.
« Reply #1 on: November 10, 2005, 08:01:08 PM »
PV = nRT to find out number of moles of gas.

Each mole of gas produces -891kJ
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There is no science without fancy, and no art without facts.

skeemask

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Re:Change in enthalpy.
« Reply #2 on: November 10, 2005, 09:13:04 PM »
-3.55x10-4 kJ. it's right, thanks
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