When it is warmed up, the balloon regains its original volume and shape. Explanation 1: The volume of the balloon decreases by the low temperature, because the gas inside is cooled down. At room-temperature the helium balloon is lighter than air with the same volume of the air, which makes it go up.Click to see full answer. Also asked, what will happen to a balloon if it is cooled?In a balloon, cooling the gas inside would cause the circumference to decrease. Answer 3: Similarly, if the balloon is cooled down, the gas inside contracts, and causes the balloon to shrink.Likewise, what happens when you leave a balloon in the sun? A balloon when kept in sun bursts after some time because outside the temperature is high and due to that the kinetic energy increases and the molecules of gas particles inside exerts a pressure on the walls of the balloon so it will continue to expand and there a stage will come that the balloon will burst.. what causes an inflated balloon to shrink when it is cooled? The frozen balloon shrank because the average kinetic energy of the gas molecules in a balloon decreases when the temperature decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon, which causes the balloon to shrink a little.What happens to a balloon when the temperature increases?In a balloon when the temperature increases, the individual gas molecules that you can’t see but that make up gases start moving really fast. Basically a warmer temperature leads to higher energy gas molecules which take up more space since they are moving faster.