question archive What mass of natural gas (ch4) must you burn to emit 268 kj of heat? ch4(g)+2o2(g)→co2(g)+2h2o(g)δh?rxn=−802
What mass of natural gas (ch4) must you burn to emit 268 kj of heat? ch4(g)+2o2(g)→co2(g)+2h2o(g)δh?rxn=−802
Subject:ChemistryPrice:1.87 Bought7
What mass of natural gas (ch4) must you burn to emit 268 kj of heat? ch4(g)+2o2(g)→co2(g)+2h2o(g)δh?rxn=−802.3kj express the mass in grams to three significant figures?
Purchase A New Answer
Custom new solution created by our subject matter experts
GET A QUOTE
Answer Preview
Answer:
From the balanced equation, we can see that 1 mole of CH4 releases 802.3 kJ of heat upon combustion. The mass of 1 mole of CH4 is:
mass CH4 = 16.04 grams
So by ratio and proportion:
mass required = (-268 kJ) / (-802.3 kJ / 16.04 grams)
mass required = 0.334 grams
