Calculate H for following reaction, at 25^ C . Calculate H for following reaction, at 25^ C . aligned & NH ₂ CN _ ( g ) + 3 2 O _ 2( ~g ) N _ 2( ~g ) + CO _ 2( ~g ) + H ₂ O _ (l) & ( U =-740.5 ~kJ , R =8.314 ~J ~K ⁻¹ ~mol ⁻¹ ) aligned

Step-by-step solution

aligned & n _ g =2- 3 2 = 1 2 ~mol & aligned R & =8.314 ~J ~K ⁻¹ ~mol ^1 & =8.314 10⁻³ ~kJ ~K ⁻¹ ~mol ⁻¹ aligned aligned Now, using formula, aligned H = & U + n _ g RT =-740.5 ~kJ + & ( 1 2 ~mol ) 8.314 & 10⁻³ ~kJ ~K ⁻¹ ~mol ⁻¹ 298 ~K aligned aligned & =-740.5 ~kJ +1.2388 ~kJ & =-739.26 ~kJ ~mol ⁻¹ & -741.7 ~kJ ~mol ⁻¹ aligned