Homework Help: Chemistry

Posted by Sean on Wednesday, June 3, 2009 at 11:18am.

The reaction between 0.045 g of calcium with an excess of water was carried out in an ice calorimeter as used in this lab. The volume of water in the calorimeter decreased by 0.18 mL during the reaction
a) Write the equation for the reaction which occurs. Is it a redox reaction?
b) Calculate the enthalpy of the reaction (in kJ/mol). Show all steps of calculation.

I have part a. It is a redox reaction. but part b, i have no idea on how to solve enthalpy change!

Please Help!

Chemistry - bobpursley, Wednesday, June 3, 2009 at 1:06pm
If you mean the volume of ice decreased by .18ml, you can calculate the energy used to melt that amount of ice.

Then normalize that energy to joules/mole or joules/gram.

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