Переведите на английский язык

1.... именно этот факт делает условие энтропии полезным.

2.... пока не будет устроена водяная рубашка.

3.... отсутствует изменение в энтропии...

4. Можно математически доказать, что если добавить

 тепло веществу или лишить его тепла,...

5.... рост энтальпии при адиабатическом сжатии

равняется работе, выполняемой при сжатии.

 

Закончите следующие предложения

1. The increase in enthalpy during adiabatic compression is

equivalent …

2. Enthalpy is the same …

3. Change of entropy is equal to …

4. The compression is adiabatic when …

5. The compression of vapor in a refrigerating compressor…

…

9. Ответьте на вопросы

1. What is thermodynamics?

2. What is enthalpy?

3. What is entropy?

4. What is adiabatic compression?

Text 6.GAS

Прочитайте текст, обращая внимание на незнакомые слова и выражения

What is a perfect gas? It is one which behaves in accordance with the gas law,

PV = MRT, where P = absolute pressure, V = volume, M = mass, T = absolute temperature, and R is a constant for the particular gas depending on its molecular weight.

The volume is directly proportional to the temperature and inversely proportional to the pressure. Oxygen, nitrogen, air and hydrogen are examples of gases which are almost perfect at moderate temperatures and pressures. The gases commonly used in refrigeration are not perfect under normal operating conditions. With the exception of carbon dioxide, their deviations from the gas law are not great at the temperatures and pressures normally prevailing in the low pressure side of a vapor compression refrigerating plant.

  What is the difference between gas and vapor? The gaseous substance in contact with the liquid from which it is formed is known as a vapor and it is still called a vapor if superheated to some extent. At still higher temperatures it is known as a gas but there is no sharp line of demarcation.

  What is critical temperature? Although in general a vapor may be liquefied by increasing its pressure up to the saturation value corresponding to the temperature, this is not so if the temperature is above a certain level. For any vapor this temperature above which no pressure will produce liquefaction, is called its critical temperature.

 What is critical pressure? The critical pressure of a vapor is the pressure required to liquefy it at the critical temperature and is the highest pressure on the temperature – pressure graph for saturated vapor. At temperatures above critical the pressure exerted by a vapor depends on the weight of it in a given space.

 

Прочитайте и переведите слова

proportional, inversely proportional, oxygen, nitrogen, hydrogen, moderate, refrigeration, carbon dioxide, deviation, prevailing, gaseous, superheated, demarcation, saturated, exerted, condition, liquid, pressure.

 

Прочитайте и переведите слова и выражения

Demarcation (line), prevailing, proportional, moderate, inversely, superheated (gas), perfect (gas), oxygen.

 

Переведите слова и выражения, составьте свои собственные выражения с каждым из них

кислород

разграничение

идеальный

перегретый

пропорциональный

умеренный

преобладающий

обратно

 

От приведенных ниже слов образуйте однокоренные слова и

Переведите их на русский язык

Behave, refrigerate, operate, saturate, superheat, press, vapor, produce, liquid, form.

Переведите слова и выражения, составьте выражения с каждым из них

1) temperature – critical, moderate, absolute, ground, indoor

2) gas – refrigerated, superheated, liquefied, city, dry, fuel

3) proportional – directly, inversely, mean

4) steam – dead, gaseous, dry, direct, wast

 

6. Ответьте на вопросы

1. What is gas?

2. What is a perfect gas?

3. What is the difference between gas and vapor?

4. What is critical temperature?

5. What is critical pressure?

Text 7.BOILING