Problem 114
A gas cylinder has \(370 \mathrm{~g}\) of oxygen at \(298 \mathrm{~K}\) and 30 atm pressure. If the cylinder was heated upto \(348 \mathrm{~K}\) then the valve were held open until the gas pressure was \(1 \mathrm{~atm}\) and the temperature remains \(348 \mathrm{~K}\). What mass of oxygen would escape in this condition? (a) \(349 \mathrm{~g}\) (b) \(359 \mathrm{~g}\) (c) \(329 \mathrm{~g}\) (d) \(339 \mathrm{~g}\)
Problem 115
A \(200 \mathrm{~mL}\) flask having oxygen at \(220 \mathrm{~mm}\) and a \(300 \mathrm{~mL}\) flask having nitrogen at \(100 \mathrm{~mm}\) are connected in such a way that \(\mathrm{O}_{2}\) and \(\mathrm{N}_{2}\) may combine in their volumes, if temperature is kept constant. Find the total pressure of the gaseous mixture. (a) \(158 \mathrm{~mm}\) (b) \(138 \mathrm{~mm}\) (c) \(148 \mathrm{~mm}\) (d) \(168 \mathrm{~mm}\)
Problem 116
Equal masses of methane and oxygen are mixed in an empty container at \(25^{\circ} \mathrm{C}\). The fraction of the total pressure exerted by oxygen is: (a) \(1 / 3 \times 273 / 298\) (b) \(1 / 3\) (c) \(1 / 2\) (d) \(2 / 3\)
Problem 117
In a mixture of \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2}\), the \(\mathrm{P}_{\mathrm{CO}_{2}}\) is \(0.4 \mathrm{~atm}\) and \(\mathrm{P}_{\text {Total }}\) is 2 atm. The percentage composition of the mixture by volume can be given as: (a) \(\mathrm{CO}_{2}=20 \%, \mathrm{H}_{2}=80 \%\) (b) \(\mathrm{CO}_{2}=40 \%, \mathrm{H}_{2}=60 \%\) (c) \(\mathrm{CO}_{2}=80 \%, \mathrm{H}_{2}=20 \%\) (d) \(\mathrm{CO}_{2}=60 \%, \mathrm{H}_{2}=40 \%\)
Problem 118
Find kinetic energy of \(0.05\) mole of an ideal gas at \(273 \mathrm{~K}\). (a) \(1702.2 \mathrm{~J}\) (b) \(170.22 \mathrm{~J}\) (c) \(17.022 \mathrm{~J}\) (d) \(34.44 \mathrm{~J}\)
Problem 119
Van der Waal equation for \(\mathrm{CH}_{4}\) at low pressure can be given as: (a) \(\mathrm{PV}=\mathrm{RT}-\mathrm{Pb}\) (b) \(\mathrm{PV}=\mathrm{RT}+\frac{\mathrm{a}}{\mathrm{V}}\) (c) \(\mathrm{PV}=\mathrm{RT}-\frac{\mathrm{a}}{\mathrm{V}}\) (d) \(\mathrm{PV}=\mathrm{RT}+\mathrm{Pb}\)
Problem 120
An open vessel having air is heated from \(27^{\circ} \mathrm{C}\) to \(127^{\circ} \mathrm{C}\). The fraction of air which goes out with respect to originally present is: (a) \(2 / 3\) (b) \(1 / 3\) (c) \(3 / 4\) (d) \(1 / 4\)
