Question

H_comb = -3910.3 kJ/mol for liquid toluene (C₇H₈, M_m = 92.70 g/mol) at 298 K. What temperature change would result at 298K from the combustion of 528.4 mg of liquid toluene in a constant pressure calorimeter with a heat capacity of 5.04 kJ·^oC^-1?

q_comb = ____ kJ

T = ____ ^oC

Answer 1

* mass of Tolume 588.4 mg (:1mg 1039] - 528.4xloºg molar mass of Toluene (C2H8) (Mm) 92.70 gland no. of to moes of Toluene under go combustion (n) . Mass olar mass Pembe 588.4 x169 ( 92.70 gimd n. 5.7x10 Pmd box The heat of liquid of combustion toluene [DH como los for '1mde' q comb]= -3910.3 KJlma Then heat of Combustion for '588-4 ng is 5.7x10? mde of Toluene is, top toolt q comb = -3910.3 kJ Ind x 5.7x103 md

L in a comb. -22,288.7 x 163 kJ е Нtees bandeer9. comb2.-222887 kJ a comb - 22 o 3 kg abo porn * Calculation g temperature change (OT) - no. of males of Iduene under go bale OFRP Combustion (n) = 5.7x10 md - heat of Combustion of tauene (9 comb) = - 82: 3 kJ toa → heat capacity at constant pressure (pl= 5.04 kJ E - we know that -3 oito no)

Daxim llotory wwwy Cemb. Heat Capacity (CA OT mb Then, AT2 a comb bre-mto th 1580.0 x Porn F = lots! tichTa +&&.3 kJ 5.04 kJ C- 8PSX 1580.0XF = otott ന്നാ - AT = 4.48 C ento P8oN hot Temperature change (AT) - 4.486) 30.5 P uxim prilor