Thermal Propert...

Three metal rods made of copper ,aluminium and brass, each 20 cm long and 4 cm  in diameter,are placed  end to end with aluminium between the other two.The free ends of copper and brass are maintained at 100 and $$0^0$$ C respectively. Assume that the thermal conductivity of copper is twice that of aluminium  and four times that of brass. The equilibrium temperatures  of the copper aluminium  and aluminium brass junctions are respectively.

By the ideal gas law, the pressure of $$0.60$$ moles $${NH}_{3}$$ gas in a $$3.00\ L$$ vessel at $${25}^{o}C$$ is, given that $$R=0.082\ L$$ atm $${mol}^{-1}{k}^{-1}$$:

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

Time taken by a $$836$$ W heater to heat one litre of water from $$10^o$$C to $$40^o$$C is?

A spherical half of volume $$1000\ cm^3$$ is subjected to a pressure of $$10$$ atmosphere. The change in volume is $$10^{-3}\ cm^{-3}$$. If the ball is made of iron find its bulk modulus.(Atmospheric pressure $$=1\times 10^{3}\ Nm^{-2})$$

Three perfect gasses at absolute temperatures $$T_1$$, $$T_2$$ and $$T_3$$ are mixed. If number of molecules of the gasses are $$n_1$$, $$n_2$$ and $$n_3$$ respectively then temperature of mixture will be (assume no loss of energy)

Two diagonally opposite comers of a square made of four thin rods of the same material, same dimensions are at temperature$$ 40^o C$$ and $$10^o C$$. If only heat conduction takes place, then the temperature difference between the other two corners will be:

In an experiment, 1.35 mol of oxygen (O2) are heated at constant pressure starting at 11.0ºC. How much heat must be added to the gas to double its volume?

A vessel has $$6g$$ of oxegen at pressure $$P$$ and temperature $$400\ K$$. A small hole is made in it so that oxygen leaks out. How much oxygen leaks out if the final pressure is $$P/2$$ and temperature is $$300\ K$$

If a thermometer reads freezing point of water as $$20^{\circ}C$$ and boiling point at $$150^{\circ}C$$ how much thermometer read when the actual temperature is $$60^{\circ}C$$.