Basic concepts of Thermal Engineering Gate Mechanical Notes
The pressure of the gas in terms of its average kinetic energy per unit volume E is equal to 2E/3 and the kinetic energy is always proportional to the temperature.
Superheated steam acts as a perfect gas and obeys all gas laws.
Absolute zero pressure will occur when there is no molecular momentum
No liquid can exist at absolute zero pressure and absolute pressure can be reached at 0 Kelvin
Gas behavior can be fully determined by four gas laws
For the ratio of specific heats of air is 1.4
Monatomic gas has the highest specific heat ratio = 1.66 According to Joule's law, internal energy is a function of temperature. 
The same volume of all gases would represent their molecular weights
Gases have two specific heat values. One is at constant pressure and the other is at constant volume
The molecular weights of all perfect gases occupy the same
volume under the same pressure and temperature conditions.
The work done in the free expansion process is always zero
The work done for a rigid container containing gas is zero
Heat and work are not properties of the system
The absolute value of internal energy cannot be found, but only the change in internal energy can be found
Based on weight, air contains 23 parts oxygen
Heat and work are path functions
NTP means normal temperature pressure
The change in enthalpy is the heat supplied during constant pressure
Change in internal energy is the heat supplied during constant volume
For isothermal process, the process index is the unit
The basis for measuring the thermodynamic property of temperature is given by the zeroth law of thermodynamics
The first law of thermodynamics provides concepts of internal energy
The second law of thermodynamics provides concepts of entropy
The third law of thermodynamics deals with the concept of zero entropy at the absolute zero temperature of 0 Kelvin.
Choking is the process during which cooling is produced
1 calorie = 4.186 Joule
POS integration is work without flow
In terms of volume, air contains 21 parts of oxygen
Molecular weight of the gas x characteristics gas constant = value of the universal gas constant
For a perfect gas, internal energy and enthalpy are functions of temperature alone.
