Question

CREDIT Show all work for partial credit. 1) How much heat energy is released when 1000. g of methane gas (CH4) is completely reacted with excess O2 according to the following equation? (up to 8 pts) Hint: you will need to convert from g- mol energy CH& Cg)+202 (g) CO2 (g ) + 2 H20 (I)+890.4 kJ

Answer 1

I show both way to solve this answer.

Sol Given C4 192 + 24 Imole od 01819) on com . C141g) + 2018) 019) + 2H2016) +890.4 kJ Calalgs on combustion with O2 19) Xelease = 890.4 kt of Energy molar mass of (1419) = (2+4 = 16 g/mol it means: 16gm at alla on reacting with excess O₂ will give 890.4 kJ of Energy. Hone; igm of CH4 = 890.4 KJ of heat recleased Therefore, 100 gm of ally when completely reacted with excess 2 give releases 890.4 X100 ) KJ ot neat = 5565 kJ of Heat Hence, heat Energy released when 100g of Methane gas is completely reached with Excess O2 with release = 5565 Tot Heat Alternatively 100 gm = . - moles of 16 methane gas Hence, moles of methane gas= 100 mole I mole of CH4 (g) is completely reacted Energy released = 890.4 kJ when nence; Net Heat released 2 890.4 X 100 = 5565 kr of leat

Please like this answer. THANK YOU

Please comment if you have any doubts about this answer.

All the best for your future.