Determine how much coal needs to be burned to obtain 1500 kJ?
| March 11, 2021 | education
From the equation it follows that when 1 mole of coal is burned, 394 kJ of energy are formed.
C + O₂ = CO₂ + 394 kJ.
To solve the problem, we will compose and solve the proportion:
1 mol = 394 kJ
x = 1500 kJ
x = 1500/394 = 3.8 mol.
Mass of 1 mol of carbon = 12 g.
Mass 3.8 mol of carbon = 3.8 * 12 = 45.6 g.
Answer: 45.6 grams of carbon are needed.
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