Total heat
THE TOTAL THERMAL = SENSIBLE HEAT + LATENT HEAT, SENSIBLE HEAT = 180 BTU LATENT HEAT = 970 BTU OF TOTAL THERMAL = 1150 BTU OF TOTAL HEAT CONTENT = ENTHALPY (BTU/LB)
We know that the total heating capacity is the sum of the sensible heat plus latent heat. If both sensible and latent heat are measured in BTU, then so is total heat. For the pound of water (32F), the total amount of heat added from the time we started, to the last drop of boiled away:
180 BTU sensible heat, to take him out of 32to 212 FF water, plus 970 BTU latent heat change the entire water into steam. Combined, the total amount of heat added 1150 BTU. It is easy to see that the largest share of total heat in pairs of latent heat.
In this example, we measured the total amount of heat transferred to the water. We can also speak of the total heat content of the water, or any liquid, for that matter. The total heat content of the pound any liquid is called the enthalpy. For water, zero enthalpy is set at 32F fluid, although 32F water contains quite a bit of heat energy. Enthalpy 212F pairs 1150 BTU per pound. You must understand the enthalpy of work pressure-enthalpy charts.
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Refrigeration