Monday

March 30, 2015

March 30, 2015

Posted by **Lucy** on Sunday, October 31, 2010 at 7:11pm.

change in H(rxn)= -296.06 kJ/mol

S(monoclinic)+O2(g)--->SO2(g)

change in H(rxn)= -296.36 kJ/mol

1. Calculate the enthalpy change for the transformation. S(rhombic)-->S(monoclinic)

Our goal is to calculate the enthalpy change for the formation of monoclinic sulfur from the rhombic sulfur. To do soo, we must arrange the equations that are given in the problem in such a way that they will sum to the desired overall equation.

So which equation should be reversed: 1st or 2nd?

What is the sign of change in H for the reversed equation: positive or negative?

- College (Enthalpy) - College -
**DrBob222**, Sunday, October 31, 2010 at 7:55pmUse equation 1 as is.

Reverse equation 2 (changer sign, too) and add to equations. Add delta Hs.

Cancel ions common to each side. You should have

S(rhombic) ==> S(monoclinic)

- College (Enthalpy) - College -
**Lucy**, Sunday, October 31, 2010 at 8:25pmThank you so much

**Answer this Question**

**Related Questions**

Chemistry-College - S(rhombic)+O2(g)--->SO2(g) change in H(rxn)= -296.06 kJ/...

Chemistry- please help ASAP!!!! thank you - S(rhombic)+O2(g)--->SO2(g) change...

College Chemistry. - During volcanic eruptions, hydrogen sulfide gas is ...

chemistry - How to calculate enthalpy change of the following reaction? : S + ...

Chemistry - Can someone help me with this question? Find the temp for conversion...

Chemistry (Enthalpy)-College - Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) ...

Chemistry - Can you help me with this question? Find the temp for conversion of ...

Chemistry-College - Given that: 2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn...

Chemistry - Reposted: Use Hess's law to calculate the enthalpy change for the ...

chemistry - Calculate the enthalpy of change, Delta H of rxn, for each of the ...