Calculate the number of hours of service that can be derived at 1 atm, 300 K from an acetylene lamp containing 640 g calcium carbide. Given that the lamp requires 50 L acetylene gas at 1 atm 300 K for one hour. [Take 0.0821 × 300 = 25]

Question

Calculate the number of hours of service that can be derived at 1 atm, 300 K from an acetylene lamp containing 640 g calcium carbide. Given that the lamp requires 50 L acetylene gas at 1 atm 300 K for one hour. [Take 0.0821 × 300 = 25],

MARKS App · Accepted Answer

C a C 2 + 2 H 2 O → C a O H 2 + C 2 H 2 moles of C a C 2 = 640 64 = 10 ∴ moles of C 2 H 2 formed = 10 ∴ V C 2 H 2 = 10 × 0.0821 × 300 = 250 Litres ∴ number of hours = 250 50 = 5

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