A phase diagram for a binary mixture of ammonia (1) - water (2) at 1 atm is show

Question

A phase diagram for a binary mixture of ammonia (1) - water (2) at 1 atm is shown in the following figure. Answer the following questions. Illustrate whenever you obtain from the diagram: What is the lowest temperature that only liquid can exist? What is the composite ? What is the highest temperature that only liquid can exist? What is the composition? Consider a mixture of 1 mole NH_3 and 4 moles H_2 O at 193.15 K. What phases exist? What are their compositions? How many moles of each phase are present. What is the activity coefficient of NH_3 in a liquid in equilibrium with its vapor of 80 degree C. Use the Lewis/Randall reference state.

Explanation / Answer

I´ll answer the first question, if you want the others answer, attach them in a new question.

a)

-100°C ...NH3.H2O... WT fraction NH3=0.3

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