Problem: At 20°C (approximately room temperature) the average velocity of N2 molecules in air is 1050 mph. What is the total kinetic energy of 1 mol of N2 molecules moving at this speed?

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We’re being asked to calculate the kinetic energy of 1 mol of N2 molecules with a speed of 1050 mph. 

To calculate for Kinetic Energy (K.E.), we’re going to use the following equation:

K.E.=12mv2

Ekinetic energy = J
m = mass, in kg
v = velocity of the e- = m/s


We’re going to calculate the Kinetic Energy of N2 molecules using the following steps:

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Problem Details

At 20°C (approximately room temperature) the average velocity of N2 molecules in air is 1050 mph. What is the total kinetic energy of 1 mol of N2 molecules moving at this speed?

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