Question

При температуре 27 °С давление газа в закрытом сосуде было 75 кПа. Каким будет давление при температуре -13 °С?

Answer 1

Ответ:

ВОТ ТАК НУЖНО РЕШАТЬ ЗАДАЧИ

Объяснение:

Answer 2

Calculating Pressure Change with Temperature

To calculate the change in pressure with a change in temperature, we can use the combined gas law, which states that the pressure of a gas is directly proportional to its temperature when the volume and the amount of gas are constant. The formula for the combined gas law is:

P1 / T1 = P2 / T2

Where: - P1 = initial pressure - T1 = initial temperature (in Kelvin) - P2 = final pressure - T2 = final temperature (in Kelvin)

Given Data

- Initial temperature (T1) = 27 °C - Initial pressure (P1) = 75 kPa - Final temperature (T2) = -13 °C (to be converted to Kelvin)

Converting Temperatures to Kelvin

To use the formula, we need to convert the temperatures from Celsius to Kelvin using the formula: T(K) = T(°C) + 273.15

For the initial temperature: T1(K) = 27 + 273.15 = 300.15 K

For the final temperature: T2(K) = -13 + 273.15 = 260.15 K

Calculating Final Pressure

Using the combined gas law formula: P1 / T1 = P2 / T2

We can rearrange the formula to solve for P2: P2 = (P1 * T2) / T1

Substituting the given values: P2 = (75 * 260.15) / 300.15

Calculating the final pressure: P2 ≈ 65.02 kPa

Therefore, at a temperature of -13 °C, the pressure in the closed vessel would be approximately 65.02 kPa.