mean_ specific heat refers to the average
value of this quantity between the temperatures named.

The specific heat of a mixture of gases is obtained by multiplying the
specific heat of each constituent gas by the percentage by weight of
that gas in the mixture, and dividing the sum of the products by 100.
The specific heat of a gas whose composition by weight is CO_{2}, 13 per
cent; CO, 0.4 per cent; O, 8 per cent; N, 78.6 per cent, is found as
follows:

CO_{2} : 13 x 0.217 = 2.821
CO : 0.4 x 0.2479 = 0.09916
O : 8 x 0.2175 = 1.74000
N : 78.6 x 0.2438 = 19.16268
--------
100.0 23.82284

and 23.8228 / 100 = 0.238 = specific heat of the gas.

The specific heats of various solids, liquids and gases are given in
Table 4.

Sensible Heat--The heat utilized in raising the temperature of a body,
as that in raising the temperature of water from 32 degrees up to the
boiling point, is termed sensible heat. In the case of water, the
sensible heat required to raise its temperature from the freezing point
to the boiling point corresponding to the pressure under which
ebullition occurs, is termed the heat of the liquid.

Latent Heat--Latent heat is the heat which apparently disappears in
producing some change in the condition of a body without increasing its
temperature If heat be added to ice at freezing temperature, the ice
will melt but its temperature will not be raised. The heat so utilized
in changing the condition of the ice is the latent heat and in this
particular case is known as the latent heat of fusion. If heat be added
to water at 212 degrees under atmospheric pressure, the water will not
become hotter but will be evaporated into steam, the temperature of
which will also be 212 degrees. The heat so utilized is called the
latent heat of evaporation and is the heat which apparently disappears
in causing the substance to pass from a liquid to a gaseous state.

TABLE 4

SPECIFIC HEATS OF VARIOUS SUBSTANCES
+--------------------------------------------------------------------+
| SOLIDS |
+-------------------------------+----------------+-------------------+
| | Temperature[2]| |
| | Degrees | Specific |
| | Fahre