Homework Help: chemistry

Posted by jen on Thursday, July 12, 2012 at 3:10am.

A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine the delta H (in units of kJ/mol NaOH) for the neutralization reaction between aqueous NaOH and HNO3. Assume no heat is lost to the calorimeter or the surroundings; and the density and heat capacity of the resulting solution are the same as water.

SO I DID THIS PROCEDURE
0.1 L x 0.300 M NaOH = 0.0300 moles NaOH.
0.1 L x 0.300 M HNO3 = 0.0300 moles HNO3.

Mass water (200 mL) x specific heat water x (Tfinal-Tinitial) = q in joules.

18(200 mL)*4.18*(37-35)=30096 joules

THEN DIVIDE IT BY 0.03 = 1003200 JOULES/MOLE
THEN I TURNED IT INTO KILOJOULES WHICH I THEN GOT 1003.2 KILOJOULES/MOL.

IS THIS CORRECT?

chemistry - jen, Thursday, July 12, 2012 at 3:32am
OH I THINK I MADE A MISTAKE. I GOT 55.7 AS MY ANSWER NOW

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