Question

Variation of $log_(10)K$ with $(1)/(T)$ is shown by the following graph in which straight line is at $45^(@)$ , hence $Delta H^(@)$ is:
A. $+4.606$ cal
B. $-4.606$ cal
C. 2 cal
D. $-2$ cal

Answer 1

Correct Answer - B
Slope of plot $= (-Delta H^(@))/(2.303 R) = 1$
$implies Delta H^(@) = - 2.303xx2 = - 4.606$ cal