Heat Flashcards
What is meant by Heat?
1) Heat is Energy exchange between system & surrounding
2) Heat is a form of transfer of energy when there is temperature difference
3) SI unit - Joule
Common unit - Calorie
4) Heat given to the system - +ve
5) Heat given by the system - -ve
1Calorie =? Joule
1 Calorie= 4.182 J
Formula for Specific Heat Capacity ( c)?
c=Q/ m∆T
Value of Specific Heat Capacity ( c) for Isothermal process?
Infinity
Because for Isothermal process ∆T=0 and anything divided by zero is infinity
( c=Q/m∆T)
Value of Specific Heat Capacity for Adiabatic process?
Zero
For Adiabatic process,∆q=0
(c=Q/m∆T)
Unit of Specific Heat Capacity (c)?
c= Q/ m∆T
Unit= J / g ° C
Specific Heat Capacity of gases at constant volume Formula?
Q=cv
Specific Heat Capacity of gases at constant Pressure Formula?
Q=cp
Define Specific molar heat capacities of gases?
Amount of heat required to raise the temperature of 1 mole of a gas by 1°C
C=Q/n∆T
Formula for molar SHC at constant volume?
Cv= Q/ n∆T
Formula for molar SHC at constant pressure?
Cp=Q/n∆T
Cv=? cv
Cp=? cp
Cv=Mcv
Cp=Mcp
Cp-Cv=?
Cp-Cv=R (for any gas)
always true
Qv=?
Qv=nCv∆T
Qp=?
Qp=nCp∆T
Formula of Cv in terms of f ?
Cv=f/2 ×R
( f by 2 ×R)
Formula for Cp in terms of f?
Cp=(f÷2+1)R
( f by 2 plus 1 into R)
What is f ?
f= degree of freedom
f depends on atomicity of gas
Value of f for monoatomic gas ( He, Ne,Ar) ?
f=3
Value of f for Diatomic gas ( O2,N2) ?
f=5
Vue of f for polyatomic gas (O3) ?
f=6
Value of gamma?
Gamma=Cp/Cv
Formula for gamma?
Gamma=1+2/f
(1+2 by f)
Value of gamma for manonatomic gas?
1.66
Value of gamma for Diatomic gas?
1.4
Value of gamma for polyatomic gas?
1.33
