Question

1st attempt See Periodic Table See Hint COAST Tutorial Problem Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics in humans. The value of AH comb for dimethylphthalate (C10H1004) is -4685 kJ/mol. Assume 0.870 g of dimethylphthalate is combusted in a calorimeter whose heat capacity (Ccalorimeter) is 6.35 kJ/°C at 21.5°C. What is the final temperature of the calorimeter? "С SUBMIT ANSWER 1 OF 5 QUESTIONS COMPLETED < 04/05 >

Answer 1

molas mass of dimethalph thalute (Colt 1604) = 194 91mo. No of moles of clothioly = mass 1 molar mas - 0.8769 = 0.00448 mola 194 g/mol Heat relased att number of mol. =4685k] Imol x (0.00448 moi) = 20.9816] This heat will be absorbed by calorimeter and its temo increases Q = C calx (Tf ~T;) 20.985 6.35*( 18-21.5) 20.98 = 6.35 xip -136.52 < 3S T = 2 6 7 8 1 3 6 2 6:35 14157.5 Tf = 1575/6.35 Tf = 24.8°C.