A plot of ln(K) versus 1/T for this reaction gives a straight line with a slope of 1.352 x 104 K and a y-intercept of -14.51. Determine the value of ΔH° for this reaction.

Answer : The value of ΔH° for this reaction is, 112.4 kJ/mol

Explanation :

According to the Van't Hoff equation,

The linear equation expression is:

y = mx + c

Plot of ln (K) versus (1/T) gives a straight line with a slope is equal to,

As we are given that:

Slope =

So,

where,

R = 8.314 J/K.mol

Thus, the value of ΔH° for this reaction is, 112.4 kJ/mol

pure substance: iron,copper

impure substance: water,charcoal

the answer would be c