Question

Which one of the following is/are correct regarding van't Hoff equation?

• A. For exothermic reaction, van't Hoff plot would always gives positive slope
• B. For exothermic reaction, van't Hoff plot would always gives negative slope
• C. For exothermic reaction, van't Hoff plot can gives both positive and negative slope
• D. None of the above

Answer 1

The correct option is A For exothermic reaction, van't Hoff plot would always gives positive slope

The van't Hoff equation is given by $logK=logA-\frac{\Delta H}{2.303R}$
For exothermic reaction, $△H<0$ since heat will release
so, slope = $-\frac{△H}{R}>0$
thus for exothermic reaction, slope will always be positive.