A gas contained in a cylinder surrounded by a thick layer of insulating material is quickly compressed. Has there been a transfer of heat?

A gas contained in a cylinder surrounded by a thick layer of insulating material is quickly compressed. Has work been done?

A mixture of fuel and oxygen is burned in a constant- volume chamber surrounded by a water bath. It was noticed that the temperature of water is increased during the process.Treating the mixture of fuel and oxygen as the system. Has heat been transferred?

It is required to double the pressure of helium gas contained in a steel cylinder , by heating it the initial temperature of Helium be 27^@C , the temperature upto which it brought to be heated is

A gas present in a cylinder fitted with a frictionless pistion expands against a constant pressure of 1atm form a volume of 2L to a volume of 6L . In doing so, it absorbs 800J heat form the surroundings. Determine the increases in internal enegry of process.

Same quantity of ice is filled in each of the two metal containers P and Q having the same size, shape and wall thickness but made of different materials. The containers are kept in identical surroundings. The ice in P melts completely in time t_1 , whereas that Q in takes a time t_2 . The ratio of thermal conductivities of the materials of P and Q is

A thermally insulated rigid container contains an ideal gas heated by a filament of resistance 100 Omega through a current of 1 A for 5 min then change in internal energy

A solid sphere of radius R made of a material of bulk modulus K is surrounded by a liquid in a cylindrical container. A massless pistion of area A floats on the surface of the liquid. When a mass M is placed on the piston to compress the liquid the fractional change in the radius of the sphere, deltaR//R , is .............

A deep rectangular pond of surface area A, containing water ( density =p, specific heat capacity =s ) is located in a region where the outside air temperature is at a steady value of 26^@C . The thickness of the frozen ice layer in this pond, at a certain instant is x. Taking the thermal conductivity of ice as K, and is specific latent heat of fusion as L, the rate of increase of the thickness of ice layer, at this instant, would be given by