When one molecule of methane combusts with oxygen, 5.74 X 10-21 J is released as heat....
When one molecule of methane combusts with oxygen, 5.74 X 10-21 J is released as heat. How many molecules of methane must undergo combustion to heat up 1 gram of water by 1 degree C. note that this process requires 4.184 J. IF one molecule of methane has a mass of 2.66 X 10-23g, how many total grams of methane are required?
Homework Answers
Answer
0.01939g
Explanation
Heat released by one methane molecule = 5.74×10-21J
Heat required to raise 1g of water to 1℃ = 4.184J
Number of methane molecule required =
4.184J / 5.74 ×10-21J = 7.289× 1020molecules
mass of 1 molecule of methane = 2.66 ×10-23g
mass of 7.289 × 1020molecules = 7.289 ×1020molecule × 2.66 ×10-23g/molecule = 0.01939g
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