Questions
The mass of Hydrogen molecule is grams if 1023 hydrogen molecules per second strike 2 of wall at an angle of 45° with the normal, when moving with a speed of cm/s. The pressure exerted on the wall is nearly
detailed solution
Correct option is B
Pressure P=FA=ΔPΔt(A)P=2mVcosθΔtA⋅Nall given values of various physical quantities are converted into MKS system; mass=3.32×10−24×10−3kg;velocity=103m/s;cos45=12;N=1023= avagadro number;time=1 sec;Area=2×10−4meter2P=2×3.32×10−24×10−3×103×cos45×10231×2×10−4P=2350N/m2Talk to our academic expert!
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Two identical containers A and B have frictionless pistons. They contain the same volume of an ideal gas at the same temperature. The mass of the gas in A is mA and that in B is mB. The gas in each cylinder is now allowed to expand isothermally to double the initial volume. The change in the pressure in A and B, respectively, is p and 1.5 p. Then
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