Melting and boiling temperatures of different substances

[riyada]

Hi all
I am sorry for the double post, I just found out there is a homework help place here..
I have this question in a practice physics exam:
The table lists melting and boiling temperatures of 4 different substances, A,B,C,D..
The question is "Which substance is a gas at 25 C?"

Substance Melting point /C Boiling point/C
A -219 -183
B -7 58
C 98 890
D 1083 2582

I have no idea how to get the answer.. Can someone please explain how..
Thanks!

 

[tiny-tim]

Welcome to PF!

The table lists melting and boiling temperatures of 4 different substances, A,B,C,D..
The question is "Which substance is a gas at 25 C?"

Substance Melting point /C Boiling point/C
A -219 -183
B -7 58
C 98 890
D 1083 2582

Hi riyada! Welcome to PF!

A solid melts at its own melting point, and becomes a liquid.

A liquid boils at its own boiling point, and becomes a gas.

The question gives you the melting point and the boiling point of four substances.

 

[riyada]

Beautifully answered!
Its "A"..
Thanks a MIL!