22 The combustion of exacily 1000g ofbenoic sod in a bomb ck

22. The combustion of exacily 1,000g ofbenoic sod in a bomb ckrineter elcases 26 of the calorimater to increase bem 23.01 to 24 17 A) If the cembustion of 0 550 g of benaoic acid casses the temperature ef B) A 0465 sample of as organic compound \"C, caloulate the heat capacity of the calorimeses 2595 , calculate the host of combutoa per gram d is barned in the same calonimter. The temperature increases from 230

Solution

Heat releases from combustion of 0.550 g of Benzoic acid = 0.550g*26.38 KJ/1.0g = 14.50 KJ

A) Heat capacity of calorimeter = -q/dT = -14.50/(24.17-23.01) = 12.5 KJ/oC

B) q = -Ccal*dT = -(12.5 KJ/oC)(25.95-23.10)= 35.62 KJ

per gram = 35.62 KJ/0.465 g = -76.61 KJ/g