Homework Help: chemistry

Posted by Amber on Tuesday, June 14, 2011 at 9:59pm.

A 4.98 g sample of aniline (C6H5NH2, molar mass = 93.13 g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25 kJ/°C. If the temperature rose from 29.5°C to 69.8°C, determine the value of ΔH°comb for aniline.

chemistry - DrBob222, Tuesday, June 14, 2011 at 10:08pm
delta H = qcal*delta T for a 4.98g sample.
(delta H/4.98) = delta H in kJ/g. Multiply by molar mass to convert to kJ/mol.
chemistry - Katie, Tuesday, January 24, 2012 at 11:30am
-7.81 × 103 kJ/mol
chemistry - Orlando, Sunday, March 11, 2012 at 4:12pm
answer is -3.2*10^3 KJ/moles katie your an idiot....
chemistry - Anonymous, Sunday, October 7, 2012 at 2:58am
7.84 * 10^3
chemistry - Griffin, Sunday, October 21, 2012 at 5:15pm
katie youre dumb. its -3.2*10^3
chemistry - Jack, Wednesday, June 12, 2013 at 11:18pm
Those who called Katie dumb are !@#$%^& heads. Katie is only trying to help!

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