Use the diagram below to answer the following question.
What will be water's phase of matter at a temperature of 74°C and a pressure of 4.4 mm?
A.
mostly liquid
B.
mostly solid
C.
solid, liquid, or gas
D.
mostly gaseous
Answer: D
I agree
To answer the question, we need to use the phase diagram provided. A phase diagram is a graphical representation of the states of matter (solid, liquid, or gas) that a substance can exist in at different combinations of temperature and pressure.
By looking at the diagram, we can see that at a temperature of 74°C (on the x-axis) and a pressure of 4.4 mm (on the y-axis), the point falls in the region labeled as "mostly gaseous." This means that at this temperature and pressure, water is primarily in the gaseous state. Therefore, the correct answer is D - mostly gaseous.