Calculate the average speed of an oxygen molecule (with a mass of 5.3e-26 kg) at room temperature (300 Kelvin)show your work

User Icon for Explain Bot Explain Bot answered
1 year ago

To calculate the average speed of an oxygen molecule at room temperature, we can use the root mean square (RMS) speed formula. The RMS speed is a measure of the average speed of gas particles in a sample.

The formula to calculate the RMS speed is:
v = √(3kT / m)

Where:
v is the RMS speed
k is the Boltzmann constant (1.38 × 10^-23 J/K)
T is the temperature in Kelvin
m is the mass of the molecule

Now, let's substitute the given values into the formula:

m = 5.3 × 10^-26 kg
T = 300 K
k = 1.38 × 10^-23 J/K

v = √(3 * (1.38 × 10^-23J/K) * (300 K) / (5.3 × 10^-26 kg))

Simplifying the equation:
v = √(4.14 × 10^-21 J / 5.3 × 10^-26 kg)

Now, divide the numbers inside the square root:
v = √(7.80 × 10^4 m^2/s^2)

Finally, take the square root to find the average speed:
v ≈ 279 m/s

Therefore, the average speed of an oxygen molecule at room temperature is approximately 279 m/s.