Give the definition of surface tension and formula in the context of (i) inter molecular forces (ii) potential energy (iii) work done.

Give the dimensional formula of surface tension.

Explain surface tension in the context of potential energy.

If work is done on system by non-conservative force, then potential energy increases.

The potential energy of a system increase if work is done ……….

At 27^@C two moles of an ideal monoatomic gas occupy a volume V. The gas expands adiabatically to a volume 2V. Calculate (i) the final temperature of the gas, (ii) change in its internal energy, and (iii) the work done by the gas during this process.