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April 19, 2014

April 19, 2014

Posted by **Sam** on Saturday, October 20, 2012 at 10:13pm.

When Snno2(s) is formed form the comustion of gray tin, the reaction enthalpy is -578.6 kJ, and when white tin is burned to form SnO2(s), the reaction enthalpy is -580.7 kJ. Calculate the reaction enthalpu for Sn(gray)-->Sn(white)

- Chemistry -
**Sam**, Saturday, October 20, 2012 at 10:14pm**SNO2(s)

- Chemistry -
**DrBob222**, Saturday, October 20, 2012 at 10:49pmSn

_{grey}+ O2 ==> SnO2 -578.6

SnO2 ==> Sn_{white}+ O2 580.7

-----------------------------

Add the two equations

Sn_{grey}==> Sn_{white}

I have turned equation 2 around and changed the sign of dHf.

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