Molecular Physics | Thermodynamics Answers

Q.1 and 2
https://drive.google.com/file/d/0B1f-P0kkAkRVdXpIbGVscFQ2dlJyNHk4RTZDbFF1RklrVDVn/edit?usp=sharing

an electric resistance carrying electric current 2A and potential difference 50V immersed in 200g of water durin 5 minutes
find
1-the change in termperature of water at the end of time
2-the rate of heat follow
3-the temperature rate

how to perform a reversible isobaric process if it is possible whether practically or theoretically ?

Two closed containers of equal volume filled with air at pressure P and temperature T.Both are connected by a narrow tube.if one of the container is maintained at temperature T and other at temperature T' ,then new pressure in the container will be ?

Three perfect gases at absolute temperatures T1,T2 and T3 are mixed.If number of molecules of the gases are n1,n2 and n3 respectively then temperature of mixture will be (assume no loss of energy)?

An ideal gas is enclosed in a container of volume V at pressure P.It is being pumped out of the container by using a pump with stroke volume V' . What is final pressure in container after n-stroke of the pump ?(assume temperature remains same)

At room temperature the rms speed of the molecules of a certain diatomic gas is found to be 1920 m/s.The gas is
(1) H2
(2)F2
(3) Cl2
(4) O2

Two thermally insulated vessels 1 and 2 are filled with air at temperatures(T1,T2),volume (V1,V2) and pressure (P1,P2) respectively.If the valve joining the two vessels is opened,the temperature inside the vessel at equilibrium will be?

During an experiment an ideal gas is found to obey an additional law PV^2 = constant.The gas is initially at temperature T and volume V,when it expands to volume 2V,the resulting temperature is
(1) T/2
(2) 2T
(3) 2^1/2T
(4) T/2^1/2

consider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K. The equivalent conductivity of the slab is
options are
(a) 2K/3 (b) (2^1/2)K (c) 3K (d) 4K/3