A balloon is filled with hydrogen at room temperature. It will burst if the pressure exceeds 0.2 bar. If at 1 bar pressure, the gas occupies 2.27 L volume, up to what volume can the balloon be expanded?
From the given data,
Substituting the values, we have
Since balloon bursts at 0·2 bar pressure, the volume of the balloon should be less than 11·35L.
Why mercury is generally used as a liquid in barometer?
It is because of the following reasons:
(i) Mercury is non-volatile at ordinary temperature, therefore, the pressure exerted by the vapours above the mercury column is very small and can be neglected.
(ii) The height of the column in a barometer is inversely proportional to the density of the liquid. Since mercury is very dense, it is best for barometer as it supports column of convenient height.
Why does the volume of a gas decrease on increasing pressure?
Gas molecules have space in between them. When the pressure is increased, the molecules of the gas are forced to come closer and as a result, the volume occupied by the gas decreases.
A manometer is connected to a gas containing bulb. The open arm reads 43.7 cm where the arm connected to the bulb reads 15.6 cm. If the barometric pressure is 743 nm mercury what is the pressure of the gas in a bar?
A weather balloon has a volume of 175 L when filled with hydrogen at a pressure of 1.00 bars. Calculate the volume of the balloon when it rises to a height of 2000m, where the atmospheric pressure is 0.80 bar. Assume that the temperature is constant ?
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