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Specific heat of a gas is considered one the most difficult concept.
28 Questions around this concept.
and
are specific heats at constant pressure and constant volume respectively. It is observed that
for hydrogen gas
for nitrogen gas
The correct relation between a and b is :
The specific heats and
of a gas of diatomic molecules A are given ( in units of
) by 29 and 22 respectively. Another gas of diatomic molecule B has the corresponding values of 30 and 21 respectively. If they are treated as ideal gases then :
Two cylinders A and B fitted with pistons contain equal amounts of an ideal diatomic gas at . The piston
is free to move, while that of
is held fixed. The same amount of heat is given to the gas in each cylinder. If the rise in temperature of the gas in
is
, then the rise in temperature of the gas in
is.
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Two moles of a monatomic gas are mixed with three moles of a diatomic gas. The molar-specific heat of the mixture at constant volume is:
The molar capacity of a mono-atomic gas if it does a work of unit when supplied a heat of
units is,
The given figure has two paths from state A to state B of a thermodynamics process The ratio of molar heat capacity in process 1 & 2 is
The pressure of a monoatomic gas increases linearly from to
when its volume increases from
to
.Calculate
Question: molar heat capacity of the gas
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The molar heat capacity of a diatomic gas, if it does a work of Q/4, when Q amount of heat is supplied to it, is
of heat is added to a monatomic gas in a process in which the gas performs a work of
.The molar heat capacity for the process is
An ideal gas is taken through a cycle as shown in figure. If the heat supplied in the cycle is
, then work done by the gas in the process
is
Specific heat - The specific heat is the amount of heat per unit mass required to raise the temperature by one Kelvin.
Now for gases we have several types of specific heat, but here we will discuss basically two types of specific heat -
It is given as -
If 1 mole of gas is placed at the place of unit mass is considered, then this specific heat of gas is called molar specific heat at constant volume and is represented by Cv (Here C is capital)
So, for molar specific heat -
2. Specific heat at constant pressure (cp) -It is defined as the quantity of heat required to raise the temperature of unit mass of gas through 1°C or 1 Kelvin at constant pressure.
It is given as -
If 1 mole of gas is placed at the place of unit mass is considered, then this specific heat of gas is called molar specific heat at constant pressure and is represented by Cp (Here C is capital)
So, for molar specific heat at constant pressure -
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