Question

12 г кислорода находятся при температуре 700°С,при этом 40% молекул диссоциирование на атомы.Чему равна средняя кинетическая энергия теплового движения частиц? Какой объём занимает газ при давлении 2*10^5 Па,если его масса равна 1 кг,а средняя квадратичная скорость молекул равна 600 м/с?

Answer 1

P=ро(p с хвостиком)gh=0,8*10*0.4=3.2Па

Answer 2

Calculation of Average Kinetic Energy of Gas Particles

To calculate the average kinetic energy of gas particles, we can use the formula:

Average Kinetic Energy = (3/2) * (R * Temperature)

Where: - R is the gas constant (8.314 J/(mol·K)) - Temperature is the absolute temperature in Kelvin

In this case, we are given that the temperature is 700°C. To convert this to Kelvin, we add 273.15 to the Celsius temperature:

Temperature in Kelvin = 700 + 273.15 = 973.15 K

Now we can substitute the values into the formula:

Average Kinetic Energy = (3/2) * (8.314 J/(mol·K)) * 973.15 K

Calculating this expression gives us the average kinetic energy of the gas particles.

Calculation of Gas Volume

To calculate the volume of the gas, we can use the ideal gas law equation:

PV = nRT

Where: - P is the pressure of the gas in Pascal (Pa) - V is the volume of the gas in cubic meters (m³) - n is the number of moles of the gas - R is the gas constant (8.314 J/(mol·K)) - T is the temperature of the gas in Kelvin

In this case, we are given that the pressure is 2 * 10^5 Pa, the mass of the gas is 1 kg, and the average quadratic speed of the molecules is 600 m/s. We need to find the volume of the gas.

To find the number of moles of the gas, we can use the formula:

n = mass / molar mass

The molar mass of oxygen (O₂) is approximately 32 g/mol.

Now we can substitute the values into the ideal gas law equation:

V = (nRT) / P

Substituting the known values, we can calculate the volume of the gas.

Please note that the calculations provided here are based on the information given in the question.