Sentence:  Assuming thermal equilibrium between the anode surface and the transpiring <WSD>argon</WSD> , the gas enthalpy rise through the anode was calculated according to the relation **f whereby the specific heat of argon was taken as **f . 
Meaning of the word marked with <WSD> tags:  a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere