Homework Help: Chemistry

Posted by Katelyn on Monday, November 15, 2010 at 6:10pm.

H2O (liquid) yields H2O gas delta H= +44kJ.

How much heat is evolved when 9.0 grams of water vapor is condensed to liquid water?

Chemistry - Nina, Tuesday, October 11, 2011 at 6:19pm
Reverse the equation to be H2O (g) --> H2O (l) delta H= -44kJ
There are 9.0 grams of H2O (g)
Find moles of the gas: 9.0/16= .50 moles
44 times .50 =22 kJ evolved

Answer this Question

Related Questions

chemistry - How much energy (in kilojoules) is released when 12.3 of steam at ...
chemistry - Imagine that 25.0 of ice at -3.0C is placed in a container holding ...
chemistry - Imagine that 25.0 of ice at -3.0C is placed in a container holding ...
Chemistry - How much energy (in kilojoules) is released when 12.8 g of steam at ...
chemistry - How much energy (in kilojoules) is released when 12.3g of steam at ...
chemistry - How much energy (in kilojoules) is released when 12.3g of steam at ...
chemistry - How much energy (in kilojoules) is released when 12.3g of steam at ...
chemistry - How much energy (in kJ) is released when 16.4 g of steam at 121.5 ...
Chemistry - H2O(l) = H2O(g) deltaHvap = + 40.7kJ shows the change in enthalpy ...
chemistry - Given the following reaction and enthalpy change, calculate the ...

For Further Reading

First Name:
School Subject:
Answer: