The value of DeltaH for cooling 2 moles of an ideal monoatomic gas from 125^@ Cto 25^@ C at constant pressure will be [given C_p = 5/2 R] ………………. .

The value of DeltaH for cooling 2 moles of an ideal monoatomic gas fro

1.	The value of DeltaH for cooling 2 moles of an ideal monoatomic gas from 125^@ Cto 25^@ C at constant pressure will be [given C_p = 5/2 R] ………………. .
Answer» `-250 R` `-500 R` 500 R `+250 R` Solution :`T_(i) = 125^(@)C=398K` `T_(f)=25^(@)C = 298K` `DeltaH = nC_(P)(T_(i)-T_(f))` `DeltaaH =2XX(5)/(2)R(298-398)` `DeltaH =-500R`