how much hydrogen ..can lift 1k.g ???

Question

anonymous · Answer

Hydrogen gas (H2) has a molar mass of 2.02 grams per mol. 
Air is a mixture of ~20% Oxygen gas (O2) and ~80% Nitrogen gas (N2) and ha an average molar mass of about 28.82 grams per mol. 
The difference in the two gasses molar masses will give you the lifting power of 1 mole of Hydrogen gas in an air atmosphere when both gasses are under the same temperature and pressure. 

1 mole of Hydrogen gas has a "lifting power" of about 26.80 grams per mole. 
At STP (standard temperature of pressure), 1 mole of an ideal gas has a volume of 22.4 Liters which would mean that Hydrogen gas would have a lifting power of about 1.20 grams per Liter (@ STP). 

1 kg = 1000 grams. 
It would take about 833.3 Liters of Hydrogen to lift 1 kg at STP, this does not take into account the weight of the balloon holding the Hydrogen gas nor does it take into account any extra mass which might be attached

anonymous · Answer

can u pls tell me ..if i wanna fill this hydrogen in weather balloon wht ill be its area

ujjwal · Answer

The density of the system comprising hydrogen and 1 kg mass should be less than the density of air.

anonymous · Answer

Calculate the mass of the balloon and the hydrogen in it (use PV = nrt to get the number of moles of hydrogen and figure 1 g/mole. You'll probably have to measure the P for a full balloon), and subtract that from the mass of air that the volume of the balloon displaces.