Two liquids of different temperatures are separated by a barrier. The hot liquid is on the right side and the cold one is on the left side. Which statement describes how the molecules move in heat flow? Molecules from the left collide and transfer heat to the barrier, which transfers heat to the right side. Molecules from the right collide and transfer heat to the barrier, which transfers heat to the left side. Molecules from the right collide and transfer heat directly to the right side. Molecules from the left collide and transfer heat directly to the right side.