Question

Use the graph of changes in water below to answer the question. What phase(s) of matter are present in section "D" of the above graph?

a)

solid

b)

liquid

c)

gas

d)

Both B and C

Answer 1

d)liquid and gas if the pressure is 1atm=760mmHg

Answer 2

Answer: Option (d) is the correct answer.

Step-by-step explanation:

It is known that water boils at
`100^(o)C`, that is, at this temperature liquid state of water starts to convert into steam or gaseous phase.

This means that, at
`100^(o)C` there are two phases present which are liquid and gaseous phase.

Also, the temperature remains constant unless and until the whole water changes from liquid to gaseous state.

Hence, we can conclude that in section D there are liquid and gaseous phase present.