Questions in thermodynamics

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	When heat energy of $1500$ Joules, is supplied to a gas at constant pressure $2.1\times {{10}^{5}}N/{{m}^{2}}$, there was an increase in its volume equal to $2.5\times {{10}^{-3}}{{m}^{3}}$. The increase in internal energy of the gas in Joules is
	If heat given to a system is 6 kcal and work done is 6 kJ. Then change in internal energy is
	In a thermodynamics process, pressure of a fixed mass of a gas is changed in such a manner that the gas releases 20 J of heat and 8J of work is done on the gas. If the initial internal energy of the gas was 30J. The final internal energy will be
	A monoatomic gas of n-moles is heated from temperature $T_1$ to $T_2$ under two different conditions (i) at constant volume and (ii) at constant pressure. The change in internal energy of the gas is
	The state of a thermodynamic system is represented by
	A perfect gas goes from state A to another state B by absorbing $8\times {{10}^{5}}J$ of heat and doing $6.5\times {{10}^{5}}J$ of external work. It is now transferred between the same two states in another process in which it absorbs ${{10}^{5}}J$ of heat. Then in the second process
	If a system undergoes contraction of volume then the work done by the system will be
	Which of the following is incorrect regarding the first law of thermodynamics
	For an ideal gas, in an isothermal process
	Can two isothermal curves cut each other