Question

what is the effect of temperature on the molecular speed?

Answer 1

Hey buddy..there you go:

The temperature of a gas is a measure of the average translational kinetic energy of the molecules. In a hot gas, the molecules move faster than in a cold gas; the mass remains the same, but the kinetic energy, and hence the temperature, is greater because of the increased velocity of the molecules.

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Answer 2

here is your answer......
If the temperature of a substance increases the moleclues start moving in greater speed and the energy supplied reduces the forces of attraction and molecules leave their places and start moving freely.
hope it helped u mate.........