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Topic: standard enthalpy of formation for acetone and oxygen  (Read 18413 times)

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Offline Frederick95

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standard enthalpy of formation for acetone and oxygen
« on: March 06, 2008, 02:50:00 PM »
Under each compound, write out the enthalpy of formation, ignoring the number of moles.
         
 C3H6O(l) + 4O2(g) --> 3CO2(g) + 3H2O(l)
                                -393.5       -285.8


I cannot find the enthalpy of formation for acetone and oxygen.

Why is this? Do they even have a standard enthalpy of formation?

Offline ARGOS++

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Re: standard enthalpy of formation for acetone and oxygen
« Reply #1 on: March 06, 2008, 03:01:46 PM »

Dear Frederick95;

If I remember correctly the WebBook should know them:   "NIST Chemistry WebBook
(Name or “Sum Formula” is possible.)

Good Luck!
                    ARGOS++


Offline Frederick95

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Re: standard enthalpy of formation for acetone and oxygen
« Reply #2 on: March 06, 2008, 03:36:09 PM »
Doesnt help:(

Offline ARGOS++

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Re: standard enthalpy of formation for acetone and oxygen
« Reply #3 on: March 06, 2008, 08:17:22 PM »

Dear Frederick95;

Can you extract it from:     "Acetone Data”?

And from:  "Standard Enthalpy of Formation”?
(Hint:  If you also count the headline, it will be on line 4!)

Good Luck!
                    ARGOS++


Offline diplomat65

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Re: standard enthalpy of formation for acetone and oxygen
« Reply #4 on: March 07, 2008, 05:09:44 PM »
I need some serious help with this assignment

A sample of acetone liquid (C3H6O) is burned in an insulated calorimeter to produce carbon dioxide gas and liquid water.  Determine the molar enthalpy of the combustion of acetone using the following information:
  A sample of liquid acetone is burned such that the heat from the burning is transferred into an aluminum calorimeter and its contents.
 
Table 1.  Observations for the combustion of acetone.

Quantity    Measurement
Mass of water    100.0 g
Specific heat capacity of aluminum    0.91 J/goC
Mass of aluminum can    50.0 g
Initial temperature of calorimeter    20.0oC
Final temperature of calorimeter    25.0oC
Mass of acetone burned    0.092 g
1. Use tabulated standard enthalpies of formation to calculate a theoretical value for the molar enthalpy of combustion of acetone.

2.  Calculate the molar enthalpy of combustion of acetone, using the experimental evidence.

3.  Calculate the percentage error for this experiment


PLEASE HELP ME ANYONE!!!! God Blesss

Offline ARGOS++

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Re: standard enthalpy of formation for acetone and oxygen
« Reply #5 on: March 07, 2008, 05:29:04 PM »

Dear Diplomat65;

Why not read:    "Molar Enthalpy of  Combusting Acetone”     


Good Luck!
                    ARGOS++


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