Sunday

December 21, 2014

December 21, 2014

Posted by **Kaylyn** on Tuesday, October 27, 2009 at 8:45pm.

2NOCl(g)---- N2(g) + O2(g) + Cl(g)

given the following set of reactions:

1/2N2(g) + 1/2O2(g)-----NO(g) delta H =90.3kJ

NO(g) + 1/2Cl2(g)----NOCl(g) delta H = -38.6 kJ

- chemistry 101 -
**DrBob222**, Tuesday, October 27, 2009 at 10:17pmAre you sure that equation 1 is correct? It isn't balanced. I think it should be

2NOCl ==> N2 + O2 + Cl2

To get that equation, multiply equation 2 by 2 and reverse it (multiply delta H by 2 and change the sign). Multiply equation 3 by 2 and reverse it (multiply delta H by 2 and change the sign). Then add the two equations to obtain the final equation. Add the multiplied delta Hs with the changed signs.

**Answer this Question**

**Related Questions**

Chemistry - The following standard free energies are given for 25 degrees ...

Chemistry - Calculate the DELTA H(rxn), DELTA S(rxn), DELTA S(universe), DELTA G...

chemistry - At 25 C the following heats of reaction are known: 2CIf (g)+ O2(g...

Chem - CH4(g)+2O2 arrow CO2(g)+2H2O(1) delta H=-890.3kJ. Calculate delta Hwhen 5...

Urgent Chemistry Problem!! - Calculate Delta G at 298 K for the following ...

Chemistry - For the reaction described by the chemical equation: 3C2H2(g) -> ...

chemistry - For the following reactions is delta Hrnx equal to delta Hf of the ...

CHEMISTRY - Please explain. The enthalpy changes for two different hydrogenation...

Chemistry - Please explain. The enthalpy changes for two different ...

Chem - Calculate delta H for the formation of one mole of N2O5 from the elements...