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!!