Thermal Propert...

A closed copper vessel contains water equal to half of its volume when the temperature. Of the vessel is raised to 447$$^{0}$$c the pressure of steam in the vessel is (Treat steam as an ideal gas, R=8310 J/k / mole, density of water =1000 kg/m$$^{3}$$ molecular weight of water =18 )

A sample of $$O_{2}$$ gas and a sample of hydrogen gas both have the same no. of moles, the same volume and same pressure. Assuming them to be perfect gases, the ratio of temperature of oxygen gas to the temperature of hydrogen gas is :

The density of a gas at N.T.P. is 1.5gm/lit. its density at a pressure of 152cm of Hg and temperature 27$$^{0}$$ C

An electric bulb of $$250cc$$ was sealed off at a pressure $$10^{-3}$$ mm of Hg and temperature $$27^{0}$$ C. The number of molecules present in the gas is

A uniform tube with piston in the middle and containing a gas at 0$$^{0}$$C is heated to 100$$^{0}$$C at one side . If the piston moves 5 cm, find the length of the tube containing the gas at 100$$^{0}$$C.

A flask is filled with 13 gm of an ideal gas at 27$$^{0}$$C its temperature is raised to 52$$^{0}$$C . The mass of the gas that has to be released to maintain the temperature of the gas in the flask at 52$$^{0}$$C and the pressure remaining the same is

One gram mol of helium at 27$$^{0}$$ C is mixed with three gram mols of oxygen at 127$$^{0}$$ C at constant pressure. If there is no exchange of heat with the atmosphere then the final temperature will be

A vertical cylindrical vessel separated in two parts by a frictionless piston free to move along the length of a vessel. The length of vessel is 90 cm and the piston divides the cylinder in the ratio 2 : 1. Each of the two parts contain 0.1 mole of an ideal gas. The temperature of the gas is $$27^{o}$$C in each part. The mass of the piston is

During an experiment an ideal gas is found to obey an additional gas law VT =constant. The gas is initially at temperature T and pressure P. When it is heated to the temperature 2T, the resulting pressure is

A cycle tube has volume $$2000 cm^3$$. Initially the tube is filled to 3/4th of its volume by air at pressure of $$105 N/m^{2}$$. It is to be inflated to a pressure of $$6 \times 10^{5} N/m^{2}$$ under isothermal conditions. The number of strokes of pump, which gives $$500 cm^3$$ air in each stroke, to inflate the tube is