Friday
April 18, 2014

Homework Help: Chemistry (check)

Posted by Mary on Sunday, June 30, 2013 at 6:02pm.

Not sure if these are right

1) What is the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol if 5.00 moles of HCl(aq) (acid) neutralized 5.00 moles of NaOH(aq) (base) and released 13093 J of heat?
13093/5= 2618.6 then convert to kj

2) Calculate the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information:

The temperature change equals 5.06C,
50.0 mL of 1.00 M concentration of Acid
50.0 mL of 1.00 M concentration of Base
Heat capacity of the calorimeter is 6.50 J/C.
The specific heat of water is 4.180 J/gC
5*5*5.06*6.50= 822.25/4.180= 196.7

3) How much heat is gained (in Joules) by the water (qwater) when a chemical reaction takes place in 100.0 mL aqueous solution and has a temperature increase of 13.26 C? (Remember cwater = 4.180 J/Cg)

100.0*13.26= 1326/4.180= 317.22

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