Question

Гелии находится при температуре 27 градусов цельсия. кинетическая энергия теплового движения всех молекул газа 10 дж определите число молекул гелия

Answer 1

$E= \frac{3}{2} NkT$
 N=2E/3kT
N=2*10/3*1,38*10^-23*300=5*10^21

Answer 2

Calculation of the Number of Helium Molecules

To calculate the number of helium molecules, we can use the kinetic energy formula:

Kinetic Energy = (3/2) * N * k * T

Where: - N is the number of molecules - k is the Boltzmann constant (approximately 1.38 x 10^-23 J/K) - T is the temperature in Kelvin

Given that the temperature is 27 degrees Celsius, we need to convert it to Kelvin:

T (Kelvin) = T (Celsius) + 273.15

So, the temperature in Kelvin is:

T (Kelvin) = 27 + 273.15 = 300.15 K

Now, we can rearrange the kinetic energy formula to solve for N:

N = (2 * Kinetic Energy) / (3 * k * T)

Substituting the given values: - Kinetic Energy = 10 J - k = 1.38 x 10^-23 J/K - T = 300.15 K

We can calculate the number of helium molecules:

N = (2 * 10) / (3 * 1.38 x 10^-23 * 300.15)

Calculating this expression gives us the number of helium molecules.

Please wait while I perform the calculation.