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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Priyanshu kumar Best Answer
read this example- Imagine an ideal gas confined to a 1-L flask at 1 atm pressure. The flask is connected by a closed stopcock to another 1-L flask, which is evacuated. Now suppose the stopcock is opened while keeping the system at a constant temperature. Then ,the gas will spontaneously expand into the second flask until the pressure is 0.5 atm in both flasks. During this constant temperature, or isothermal expansion into a vacuum, the gas does no work (w = 0) and no heat is transferred between the system and surroundings (q = 0).
now got it shweta??
S is a state function so it doesn't change...as Pext is 0 so no work done also no heat is exchange between system and surroundings...delta S surroundings also equal to 0...
thanks 😊
sir cp is also equal to change in enthalpy of product -reactnt .
yes Shweta heat capacity at constant pressure Cp= DelH/ DelT
also called kirchoffs law at constant pressure
ok sir