IMAT 2016 Q46 [Becoming Gases]

The compounds carbon dioxide (CO_2), propane (C_3H_8) and ethanal (CH_3CHO) all have M_r = 44.

Which of the following lists correctly shows these compounds in the order that they become gases as their temperature rises from –100°C at the same pressure?

A. CO_2, C_3H_8, CH_3CHO
B. CH_3CHO, C_3H_8, CO_2
C. CO_2, CH_3CHO, C_3H_8
D. C_3H_8, CO_2, CH_3CHO
E. C_3H_8, CH_3CHO, CO_2