Question

To calibrate a certain constant-volume calorimeter, 0.251 g of benzoic acid (C₆H₅CO₂H) was burned in it. The temperature rose from 24.12 °C to 25.46 °C. The heat released by benzoic acid is known to be 65.4 kJ/mol at 298.15 K.

a. Calculate the effective heat capacity of the calorimeter.

b. Using the same calorimeter: Calculate the heat produced per mole, if a 0.113 g sample of camphor (C₁₀H₁₆O) caused a temperature increase of 1.24 °C from an initial temperature of 24.5 °C.

Answer 1

a males of Benzoic mos and maly mos 0.251 gm . 122-12 gt mal 2.05 X 1o? mali. Jeased - when 0.251 gm benzoic and bum suo x mal of benzoic and 65.4 kalmal X 2.05 x 103 mail 134 0.7 x UJ e 134.07 Joul ... q q = - COT calorimeter | It-ti) constant = (25.46 - 24.12). 34 134. 07 = CX 1.34 c. Cz 134.07 : 100 loc

.. heat produced - COT SI = 1:24. [ C. - 1oo 2.1°C 10.o 11.6 124 1.24 Joule male of Camphor = Үncy malir man 0.113 am 1.5.2.23 glmal _ 7.42 x 10-4 mei heat produced per meile males of campher 124 Joule 7:42 x 104 1240. X lo² Jouke I mal 7:42 - 167 · 12 e kalmal