# chemistry

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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 got the a), but i need help with b)
what's the enthalpy of formation for calcium hydroxide? wat is it measured in? and what equation do i use?

• chemistry -

Please look at your post and look at the material you used to make the post. Is there no temperature listed?

• chemistry -

nope...temperature is not given

m = deltaV x (-11.05) is given

i think your're supposed to use this formula to find mass and then use q = m x (deltaHf) to find q

finally u would use deltaH = q/n to find change in enthalpy

im not sure though...and if this is the case, what would be the enthalpy of formation and what is it measured in? kJ/mol or just kJ?

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