8g of methane and 2g of hydrogen are mixed and kept at 760 mm pressure at 273 K,the total volume occupied by the mixture will be:
Correct answer: C. 33.6 dm3
- A. 11.2 dm3
- B. 22.4 dm3
- C. 33.6 dm3
- D. 44.8 dm3
Explanation
273K=0°C is the standard temperature. Moles of methane=mass/mr=8/(12+4)=0.5mol Volume=molxVolume at STP=0.5x22.4=11.2dm3 Moles of Hydrogen=mass/mr=2/2=1mol Volume=molxvolume at STP=1x22.4=22.4dm3 So,total volume=22.4+11.2=33.6dm3
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About Ideal Gas Equation
The ideal gas equation, PV = nRT, relates pressure, volume, amount and absolute temperature when gas particles are assumed to have negligible volume and no intermolecular forces. Applications include finding molar mass, density or an unknown gas variable, with careful use of Kelvin temperature and consistent units, and comparison with real-gas behaviour.
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