Homework Help: chemistry

Posted by blasting on Wednesday, February 17, 2010 at 6:14pm.

When 0.667 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 108C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. what is the molar heat of reaction, H rxn, for the reaction of

Ca(s) + 2H+(aq) =Ca2+(aq) + H2(g) in kj/mol

do i use the same concept
mass water x specific heat water x delta T = q
how do i find mass water and specific heat water though

chemistry - DrBob222, Wednesday, February 17, 2010 at 6:28pm
yes.
density of water is 1.00 g/mL (given) so 200 mL has a mass of 200 grams.
specific heat water = 4.184 J/g*C.

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