Question

D. 49.6 kJ E. 57.3 kJ 7. Butane (C4H10) undergoes combustion in excess oxygen to generate gaseous carbon dioxide and water. Given AH° [C4H10(g)] = -124.7 kJ/mol, AH° [CO2(g)] = -393.5 kJ/mol, AH [H2O(g)] = -241.8 kJ/mol, how much energy is released (kJ) when 8.30 g of butane is burned? Combustion of butane: 2 CH2(g) + 13 O2(g) → 8 CO2(g) + 10 H20(g) A. 22,100 kJ B. 2,658.3 kJ C. 379 kJ D. 759 kJ E. 2,910 kj 8. Calculate the standard enthalpy of formation of liquid methanol, CH,OH(I), using the following information: AH = -393.5 kJ/mol AH° = -285.8 kJ/mol C(graph)+ O2 + CO2(g) AH° = -726.4 kJ/mol H2(g) + (1/2)02 → H2O(1) CH3OH() +(3/2)02(g) → CO2(g) + 2H2O(l) A. -1,691.5 kJ/mol B.-238.7 kJ/mol C.-47.1 kJ/mol D. 47.1 kJ/mol E. 1691.5 kJ/mol 9. The combustion of pentane produces heat according to the equation CsH12(1) + 8O2(g) → 5CO2(g) + 6H20(1), AHºrn= -3,510 kJ/mol. How many grams of CO2 are produced per 2.50 x 103 kJ of heat released? A. 0.0809 g B. 3.56 g C. 31.38 8.30 D. 157 g E. 309 g

can you do the 7 and 9 ? can you also show and explain me step by step?

Answer 1

087. Oh on = ZOHS Reactants durante - SA - Product, = 2 xHf IC 44,0J + 13 8 Hj 10 - 8 anycos) – 10 44; (450) 124.7) + 1310) - 8 (-393.5) - 106241.8) J RJ/mol 5316.6 kJ/mol 58.124 According to the reaction , 2 moles of butane, Culio produces 5316.6 kJ/mol energy 2 moles y butane = 2x8 = og 116.249 - 5316.6 kJ/mol energy lg → 5316.6 kJ/mol 116.24 8.30g - 5316.6 X 8.30k J/mol = 379.6 kJ/mol Answer a 99. According to the reaction. 3510 kJ/mol energy is produced by 5 moles y u 5 modes of Q = 5x 44.019 = 220.0059 $ 3510 kJ/mol → 220g Co 1 kJ/mol = 220 Bg Q 3510 2.50 X 10 kJ = 220 x 2.50 x 10 go 3510 = 156.699 C in [ @ 157g|