Asked: November 9, 20202020-11-09T21:02:17+00:00 2020-11-09T21:02:17+00:00 What mass of natural gas (ch4) must you burn to emit 269 kj of heat? cameron 142 Questions 1 Answer 1 Best Answer 0 Points View Profile cameron Hey. what mass of natural gas (ch4) must you burn to emit 269 kj of heat? natural gas 1 Answer Voted Oldest Recent alice 0 Questions 136 Answers 136 Best Answers 136 Points View Profile Best Answer alice 2020-11-09T21:02:30+00:00Added an answer on November 9, 2020 at 9:02 pm CH4(g)+2O2(g)—>CO2(g)+2H2O(g)…………………. ΔHrxn∘=−802.3kJ From the chemical equation, we can observe that one mole of methane yields 802.3 Kj. But our requirement is to yield 269 kJ = 269 kJ / 802.3 kJ= 0.3352 moles of methane are needed By using enthalpy of the equation to convert kilojoules of CH4 into moles. Utilizing the formula of molar mass by moles result in the mass of methane. The calculation is as followed = 16.042 g/mol * 0.3352moles =5.3786g 0 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Leave an answerLeave an answerCancel reply Attachment Select file Browse Featured image Select file Browse Save my name, email, and website in this browser for the next time I comment.