When .7521 g of benzoic acid was burned in calorimetercontaining 1000 g of water

Question

When .7521 g of benzoic acid was burned in calorimetercontaining 1000 g of water, a temperature rise of 3.6 degreescelcius was observed. The heat capacity of the bomb calorimeter,excluding the water is 1.34 kJ/ degrees celcius. Calculate enthalpyof combustion in kJ per gram benzoic acid.   Im pretty sure the answer is -26.42 kJ/ g....I just need toknow how to do the work. Please show all work. Thank you When .7521 g of benzoic acid was burned in calorimetercontaining 1000 g of water, a temperature rise of 3.6 degreescelcius was observed. The heat capacity of the bomb calorimeter,excluding the water is 1.34 kJ/ degrees celcius. Calculate enthalpyof combustion in kJ per gram benzoic acid.   Im pretty sure the answer is -26.42 kJ/ g....I just need toknow how to do the work. Please show all work. Thank you

Explanation / Answer

q=msT or q=cT (for the heat capicity of the cal) so first claculate the enthalpy for the water and the cal. 1000g*4.184*(3.6)=15.1kJ (this is the heat for the water) 1.34*(3.6)= 4.824kJ (cal) so we know that .7521g of benzonic acid releases 19.924kJ ofenergy now use that as a converson factor and covert to moles 1 mole of benzonic acid= 122.12 grams so 122.12 * (19.924/.7521)=3235.1 kJ so now divide that by 122.12 to get your answer in g/kJ =26.49 kJ now since the heat was released you have -26.49kJ (remember thevalue is just directional). if you need more claification let me know, i just figured i woulddo this since i knew how, and cramster people are always helpingme.

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