Q1 of 31 Page 90

A cubic vessel (with faces horizontal + vertical) contains an ideal gas at NTP. The vessel is being carried by a rocket which is moving at a speed of 500m s-1 in vertical direction. The pressure of the gas inside the vessel as observed by us on the ground

By Ideal Gas equation,


where P, V and T are the pressure, volume and absolute temperature; n is the number of moles of gas; R is the ideal gas constant.


Here Pressure remains unchanged as V, n, R and T are constant inside the vessel. When collision takes place inside the vessel only the relative velocity changes.

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2

1 mole of an ideal gas is contained in a cubical volume V, ABCDEFGH at 300 K (Fig. 13.1). One face of the cube (EFGH) is made up of a material which totally absorbs any gas molecule incident on it. At any given time,

 3

Boyle’s law is applicable for an

 4

A cylinder containing an ideal gas is in vertical position and has a piston of mass M that is able to move up or down without friction (Fig. 13.2). If the temperature is increased,


 5

Volume versus temperature graphs for a given mass of an ideal gas are shown in Fig. 13.3 at two different values of constant pressure. What can be inferred about relation between P1 & P2?