Question

For silver Cp (J K^-1 mol^-1) = 23 + 0.01 T. If the temperature (T) of 3 moles of silver is raised from 300 K to 1000 K at 1 atom pressure, the value of ΔH will be close to ______.

विकल्प

• 62 kJ

• 16 kJ

• 21 kJ

• 13 kJ

Answer 1

For silver Cp (J K^-1 mol^-1) = 23 + 0.01 T. If the temperature (T) of 3 moles of silver is raised from 300 K to 1000 K at 1 atom pressure, the value of ΔH will be close to 62 kJ.

Explanation:

`Delta "H" = int_("T"_1)^("T"_2)`nCpdT

`= "n" int_300^1000`(23 + 0.01 T) dT   ...[Here C_p = (23 + 0.01 T)]

`= 3[23 "T" + (0.01 "T"^2)/2]_300^1000`

`= 3[(2 xx 23 xx 700 + 9100)/2]`

= 61950 J/mol

= 62 kJ/mol