Kinetic Theory ...

Two blocks of the same metal having the same mass and at temperature $$T_1$$  and $$T_2$$, respectively. are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, $$\Delta S$$, for this process is :

An ideal gas in a container of volume $$500c.c.$$ is at a pressure of $$2\times 10^5Nm^{-2}$$. The average kinetic energy of each molecule $$6\times 10^{-21}J$$. The number of gas molecules in a container is:

One mole of monoatomic gas is carried along process ABCDEA as shown in the diagram.Find the net work done by gas.

At 323 K, the vapour pressure in millimeters of mercury of a methanol-ethanol solution is represented by the equation $$p=120{ x }_{ A }+140$$,where $${ x }_{ A }$$ is the mole fraction of methanol. Then the value of $$\lim _{ { X }_{ A }\rightarrow 1 }{ \frac { { P }_{ A } }{ { X }_{ A } }  } $$

From the following data of $$\Delta H$$, of the following reactions, 

Three lawn chairs, one made up of aluminium (heat capacity $$= 0.90\ J/K-g$$), one of iron (heat capacity $$= 0.45\ J/K-g$$) and one of tin (heat capacity$$ = 0.60\ J/K-g$$) are painted of the same colour. On a sunny day which chair will be hotter to sit?

One kg of a diatomic gas is at a pressure of $$ 8\times 10^{4}\mathrm{N}/\mathrm{m}^{2}$$. The density of the gas is 4 $$\mathrm{k}\mathrm{g}/\mathrm{m}^{3}$$. The energy of the gas due to its thermal motion will be

Three closed vessels A, B and C are at the same temperature T and contain gases which obey the Maxwellian distribution of velocities, Vessel A contains only $${ O }_{ 2 }$$ B only $${ N }_{ 2 }$$ and C a mixture of equal quantities of $${ O }_{ 2 }$$ and  $${ N }_{ 2 }$$ If the average speed of the $${ O }_{ 2 }$$ molecules in vessel A is $${ V }_{ 1 }$$, that of $$N_{ 2 }$$ molecules in vessel B is $$V_{ 2 }$$ the average speed of the $$O_{ 2 }$$ molecules in vessel C is ( where M is the mass of an oxygen molecule) 

The value of universal gas constant is $$R=8.3$$ J/K - mol. The value of $$R$$ in atmosphere litre per kelvin mol

For monoatomic gas the relation between pressure of a gas and temperature T is given by $$P_\alpha T^C$$. Then value of C will be : (For adiabatic process)