Thermodynamics ...

One end of a $$0.25\ m$$ long metal bar is in steam and the other end is in contact with ice. If $$12\ g$$ of ice melts per minute, what is the thermal conductivity of the metal? Given cross-section of the bar $$= 5\times 10^{-4} m^{2}$$ and latent heat of ice is $$80\ cal/g$$.

"Heat cannot by itself flow from a body at lower temperature to a body at higher temperature" is a statement of the consequence of

Select the incorrect option about spontaneous exothermic reaction.

Two bars of same length and same cross -sectional area but of different thermal conductivities $$K_1$$ and $$K_2$$ are joined end to end as shown in the figure .One end of the compound bar is at temperature $$T_1$$ and the opposite end at temperature $$T_2$$ $$(where T_1 > T_2)$$.
The temperature of the junction is 

The internal energy of a system remains constant when it undergoes

Which of the following options is correct regarding spontaneity of a process occurring on a system in which only pressure-volume? work is involved and S, G, Cl, H, V, and P have usual meaning as in thermodynamics?

A certain mass of gas is taken from an initial thermodynamic state A to another state B by process I and II. In process I the gas does 5 joules of work and absorbs 4 joules of heat energy. In process II, the gas absorbs 5 joules of heat. The work done by the gas in process II (see figure) is

If Q increases then:

The internal energy $$U$$ is a unique function of any state because change in $$U$$.

Magnitude of Seebeck emf between the junctions does not depend on