container by considering the following argument. If we take two containers of same type of gas with same volume V, same pressure P and same temperature T, then the gas in each container obeys the above equation. PV = CT. If the two containers of gas is considered as a single system, then the pressure and temperature of this combined system will be same but volume will be twice and number of particles will also be double as shown in Figure .
not a quantity and through the work energy is transferred to the system . So we cannot use the word ‘the object contains more work’ or ‘less work’. Either the system can transfer energy to the surrounding by doing work on surrounding or the surrounding may transfer energy to the system by doing work on the system. For the transfer of energy from one body to another body through the process of work, they need not be at different temperatures.
. . Meaning of temperature Temperature is the degree of hotness or coolness of a body. Hotter the body higher is its temperature.
The temperature will determine the direction of heat flow when two bodies are in thermal contact. The SI unit of temperature is kelvin (K) . In our day to day applications, Celsius (˚C) and Fahrenheit (°F) scales are used. Temperature is measured with a thermometer.
The conversion of temperature from one scale to other scale is given in Table . Table . Temperature conversion Scale To Kelvin From Kelvin Celsius K=°C + . °C = K − .
× °C) + - - - - Unit Heat and thermodynamics N = μ N A ( . ) where N A is Avogadro number ( . × mol – ) Substituting for N from equation ( . ), the equation ( .
) becomes PV = μ N A kT