Question

If most probable velocity is represented by ${}^{\prime }{a}^{\prime }$ and fraction of molecules possessing it by ${}^{\prime }{f}^{\prime }$, then with increase in temperature which one of the following is correct?

• A. a increases, f decreases
• B. a decreases, f increases
• C. Both a and f decreases
• D. Both a and f increases

Answer 1

The correct option is A a increases, f decreases


f' < f
a' > a
f = fraction of molecules possessig velocity (V)
a = most probable velocity.
With the increases in temperature, curve become more broadened and flattened and hence, 'f' will decrease and 'a' will increases since it is directly proportional to the square root of the temperature.