1 kg of calcium carbide (CaC2) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour ?
Correct answer: B. 10
- A. 5
- B. 10
- C. 15
- D. 20
Explanation
The reaction produces 26 kg of acetylene from 64 kg of calcium carbide, so 1 kg gives about 0.406 kg, or roughly 353 L at NTP. Burning at 35 L/h gives 353/35, approximately 10 hours.
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