What is Latent heat: Definition and 206 Discussions
Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process — usually a first-order phase transition.
Latent heat can be understood as energy in hidden form which is supplied or extracted to change the state of a substance without changing its temperature. Examples are latent heat of fusion and latent heat of vaporization involved in phase changes, i.e. a substance condensing or vaporizing at a specified temperature and pressure.The term was introduced around 1762 by British chemist Joseph Black. It is derived from the Latin latere (to lie hidden). Black used the term in the context of calorimetry where a heat transfer caused a volume change in a body while its temperature was constant.
In contrast to latent heat, sensible heat is energy transferred as heat, with a resultant temperature change in a body.
Latent heat is the variation of entalpy between two phases (or the heat that you must provide to the system to change the phase).
But, if we are in a unstable system (such as water at 1 atm of pressure and 270 K of temperature), we need no heat to change the phase, simply we have to variate...
A couple of anoying problems that i know i should be able to do but are just getting me frustrated.
1. A 50.0-g copper calorimeter contains 250g of water at 20 degrees C. How much steam must be condensed into the water if the final temperature of the system is to reach 50 degrees C
so, the...
Allright, I may sound stupid on this one.
How much heat (Q) is required to change 456 g of ice at -25(degrees celsius) into water at 25(degrees C). The Specific heat of ice is 2090 J/kg K, the specific heat of water is 4186 J/kg K. The latent heat of fusion of water is 33.5*10^4 J/kg.
Is...
There was this problem regarding Latent Heat that I would like further clarification:
Problem:
200g of ice at -10C is added to 1kg of water at 15C in an insulated container. Is there enough ice to cool the water to 0C? If so, how much ice and water are present once equilibrium is reached...