A thermos flask contains coffee. It is shaken vigorously. (i) Has any heat been added to it.
(ii) Has any work been done on it.
(iii) Does it internal energy change?
(iv) Does its temp. rise?

A theoms flask contains coffee. It is vigorously sheken, considering the coffee as the system. (a) Does its temperature rise ? (b) Has heat been added to it ? (c ) Has work been done on it ?

A thermally insulated can (like thermal flask) containing a liquid is shaken vigorously. Will there be any change in the amount of heat energy present in it. If there is a change, discuss how it can be noticed.

When a thermos flask with some water in it is vigorously shaken. Does its temperature rise. Has some heat added to water during the process.

The temperature of an object is observed to rise in a period. In this period (i) Heat is certainly supplied to it (ii) Heat is certainly not supplied to it (iii) heat may have been supplied to it (iv) work may have been done on it.

First law of thermodynamics is the general law of conservation of energy as applied to heat energy. According to this law, whenever heat is added to a system, it transforms to an equal amount of some other forms of energy. If dQ= a small amount of heat supplied to the system, dW= small amount of work done by the system and dU= small change in internal energy of the system, then dQ=dU+dW . Read the above passage and answer the following questions: (i) The amount of heat obsorbed by a gas is 10 cals and work done on the gas in 58J . Calculate increase in internal energy of the gas. (ii) What values of life do you learn fron this law?

When an ideal gas undergoes an adiabatic change causing a temperature change DeltaT (i) there is no heat ganied or lost by the gas (ii) the work done by the gas is equal to change in internal eenrgy (iii) the change in internal energy per mole of the gas is C_(V)DeltaT , where C_(V) is the molar heat capacity at constant volume.

For an ideal gas, (i) the change in internal energy in a constant pressure process from temperature T_1 to T_2 is equal to nC_V(T_2-T_1) , where C_V is the molar heat capacity at constant volume and n is the number of moles of the gas (ii) The change in internal enregy of the gas and the work done by the gas are equal in magnitude in an adiabatic process. (iii) The internal energy does not change in an isothermal process. ltbr. (iv) no heat is added or removed in an adiabatic process

A thermally insulaated, closed copper vessel contains water at 15^(0)C . When the vessel is shaken vigorously for 15 minutes, the tempreture rises to 17^(0)C . The mass of the vessel is 100 g and that of the water is 200 g. the specific heat capacities of copper and water are 420 Jkg^(-1) K^(-1) and 4200 J kg^(-1)K^(-1) respectively. negalect any thermal expansion. (a) how much heat is transferred to the liquid-vessel system ? (b)how much work has been done on this system? (c ) how much is the increase in internal energy if the system ?

A thermally insulated, closed copper vessel contains water at 15^@C . When the vessel is shaken vigorously for 15 minuts, the temperature rises to 17^@C . The mass of the vessel is 100 g and that of the water is 200 g. The specific heat capacities of copper and water are 420(J)/(kg-K) and 4200(J)/(kg-K) resprectively. Neglect any thermal expansion. (a) How much heat is transferred to the liquid vessel system? (b) How much work has been doen on this system? (c ) How much is the increase in internal energy of the system?