1 gm of water having a volume of 1 cc becomes. 1671 cc steam when boiled at atmospheric pressure. If latent heat of vapourization of water is `540cal//gm` at 1 atm, how much gain in internal energy takes place ?

If the concentration of water vapour in the air is 1% and the total atmospheric pressure equals 1 atm then the partial pressure of water vapour is :

One gm of water at 373 K is converted into steam at the same temperature. The volume of 1 c .c of water becomes' 1671 c.c on boiling. Calculate the change in internal energy of the system if heat of vaporisation of water is 5.4xx10^5calkg^-1 .

What volume of hydrogen gas measured at 273 K at 0.5 atmospheric pressure will be obtained when 0.1 faraday of electricity is passed through acidulated water ?

When 1.3 g of a solute is dissolvedf in 169 g of water the boiling point of the solution is 100.025^@C at one atmospheric pressure. If K_b of water is 0.52 K kg mol^(-1) . Calculate the molecular mass of the solute.

How much of ice will be converted into water at 0^@C if 10g of steam condenses into water at on a block of ice ? (latent heat of ice = 80cal/g, latent heat of steam = 540cal/g).

Latent heat of vaporisation of a liquid at 500K and 1 atm pressure is 10.0 kcal/mol. What will be the change in internal energy (triangleE) of 3 mole of liquid at same temperature:

When 25 gm of ice at - 20^@C have absorbed 2500 cal of heat, what is the temperature of the resulting water? (latent heat of ice = 80 "cal"//(gm) and specific heat of ice = 0.5 "cal"//(gm)//^@C) .

A vessel has nitrogen gas and water vapours at a total pressure of 1 atm. The partial pressure of water vapours is 0.3 atm. The contents of this vessel are transferred to another vessel havig one third of the capacity of original volume, completely at the same temperature, the total pressure of the system in the new vessel is :

A solid body floats on water with 1/4th of its volume above the surface. What fraction of its volume will project above the surface, if it is immersed in a liquid of density 1.2 gm/cc?