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The combustion of Benzoic acid at constant volume is accompanied by an evolution of 771.5 k cal mort 1.247 g of Benzoic acid at 25°C is burnt in a bomb calorimeterand showed a temperature rise = 2.870°C. Calculate the total heat capacity of thecalorimeter [Molar mass = 122.12 g mor'(a) 2400 cal deg(b) 2745 cal deg(c) 2975 cal deg(d) 2225 cal deg |
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Answer» tion:answrsearchWhat would you like to ask?11thChemistryThermodynamicsEnthalpies for Different Types of ReactionsHeat of combustion of benzo...CHEMISTRYHeat of combustion of benzoic acid (C 6 H 5 COOH) at constant volume at 25 0 is 3233KJ/mole. When 0.5g of benzoic acid is BURNT in bomb CALORIMETER, the temperature of calorimeter increased by 0.53 0 C. Now in the same bomb calorimeter 1g of C 2 H 6 burnt then temperature increased by 2.04 0 C. △H for combustion of C 2 H 6 is?HARDHelp best friendStudy laterANSWERcamb△H for C 6 H 5 COOH−3233 k J /molmoles in O Sy= 1220.5 = 2441 mol∴ heat ecvaluted =( 2441 ×3233)kJget specific heat for bomb calanmeter be∴5×0.53 o = 2443233 kJ⇒8= 244×0.533233 =25kJ/ o C∴ when temp inc. by 2.04 o CHeat supplied =2.04×25=51 kJ∴54 kJ is RELEASED when 1gC 2 H 6 is burnt,IE 301 mol is∴ for 1 mol, heat is 51×301530 k J /mol |
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