Question

Сухой термометр психрометра показывает 14 градусов цельсия , а влажный 10 градусов цельсия.Найти относительную влажность воздуха парциальное давление и плотность водяного пара

Answer 1

Ответ:

Объяснение:

t1=14°    t2=10°   p=?    ρ=?

===

Δt=t1-t2=14-10=4

По таблице φ=0,6 (60%)

Для 10° давление  и плотность насыщенного пара из таблицы:

рн=1,23*(5/2)*v*R*ΔTПа

ρн=9,4 г/м³

Парциальные давление и плотность:

р=φ*н=0,6*1,23*10³=0,738*10³ Па

ρ=φ*ρн=0,6*9,4=5,64 г/м³

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Answer 2

Calculation of Relative Humidity, Partial Pressure, and Density of Water Vapor

To calculate the relative humidity, partial pressure, and density of water vapor, we need to use the readings from the dry-bulb and wet-bulb thermometers. Given that the dry-bulb thermometer shows a temperature of 14 degrees Celsius and the wet-bulb thermometer shows a temperature of 10 degrees Celsius, we can proceed with the calculations.

1. Relative Humidity: The relative humidity (RH) is the ratio of the actual amount of water vapor present in the air to the maximum amount of water vapor the air can hold at a given temperature. It is expressed as a percentage.

To calculate the relative humidity, we can use the following formula:

RH = (e / es) * 100

Where: - RH is the relative humidity - e is the vapor pressure of water vapor in the air - es is the saturation vapor pressure at the given temperature

To find the saturation vapor pressure, we can refer to the provided search snippet However, the snippet does not provide the specific values for the temperature range we have. Therefore, we cannot calculate the exact relative humidity without additional information.

2. Partial Pressure of Water Vapor: The partial pressure of water vapor (Pv) is the pressure exerted by water vapor molecules in a mixture of gases. It is a component of the total atmospheric pressure.

To calculate the partial pressure of water vapor, we can use the following formula:

Pv = e * (P / 100)

Where: - Pv is the partial pressure of water vapor - e is the vapor pressure of water vapor in the air - P is the total atmospheric pressure (in this case, it is assumed to be 100 kPa)

However, we do not have the vapor pressure value (e) from the provided information, so we cannot calculate the partial pressure of water vapor.

3. Density of Water Vapor: The density of water vapor (ρv) is the mass of water vapor per unit volume of air. It is typically expressed in grams per cubic meter (g/m³).

To calculate the density of water vapor, we can use the following formula:

ρv = (Pv * Mw) / (R * T)

Where: - ρv is the density of water vapor - Pv is the partial pressure of water vapor - Mw is the molar mass of water (18.015 g/mol) - R is the ideal gas constant (8.314 J/(mol·K)) - T is the temperature in Kelvin (convert from Celsius to Kelvin by adding 273.15)

However, since we do not have the partial pressure of water vapor (Pv), we cannot calculate the density of water vapor.

In conclusion, without the specific values for the saturation vapor pressure and vapor pressure of water vapor, we cannot calculate the relative humidity, partial pressure, and density of water vapor. Additional information is needed to perform the calculations accurately.