why latent heat of steam increase with increase in pressure?

Answer 1

Does it?

What do you mean by "latent heat"? Are you talking about some kind of "specific" latent heat (ie. per unit mass) like enthalpy?

If so, I guess the answer would involve the work you did to increase the pressure.

Answer 2

It's simply due to the increase in density of the water molecules. The more pressure you induce (in an adiabatic reaction anyways) the more dense, and thus, liquid/viscous it becomes.

If you're asking why compressed air (or steam) raises in temperature, and lowers in temerature when it is suddenly released, it all stems back to that adiabatic reaction I mentioned. Adiabatic means that there is no heat flow/excess generation from a process. Energy cannot be created or destroyed, only transferred or transformed (and ALL energy ends-up as heat in the end). When steam (or any gas/vapor for that matter) is compressed, it raises in temperature due to the density and friction of the molecules. It's how ALL forms of phase-change, gas/vapor refrigeration work.

Answer 3

all molecules when under pressure revert to their simplier states. Air turns to liquid and liquid turns to a solid. If you compress gas it will turn to a liquid. Therefore, increasing pressure in a given amount of air will cause the water vapor that is not visible in the air to turn into a liquid causing it to become visible. Visible mosture in the air is known as steam.

Answer 4

I believe it is Boyle's law. Temperature, Pressure, and Volume are all related. Check out this site, it will make it clear for you (I think):

http://www.grc.nasa.gov/WWW/K-12/airplane/aboyle.html

Answer 5

because it newr saturation