Tanks of compressed gas must be kept away from heat sources. if a compressed–gas tank is heated too much, it may explode and cause a great deal of damage. which of the following best explains why a compressed–gas tank can explode if it is heated? a. as the gas gets hotter, the molecules gain energy and move farther apart, causing the gas to expand. b. as the gas gets hotter, the molecules expand, causing the gas to exert more pressure. c. as the gas absorbs heat, the molecules break apart, increasing the volume of the gas. d. as the gas absorbs heat, the molecules move more quickly, making the gas more corrosive.