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How does liquid nitrogen make a balloon explode? 🎈💥 Liquid nitrogen sits at a chilling -320°F. When it’s poured into a warm container, it boils instantly, transforming from a liquid into a rapidly expanding gas. As the nitrogen molecules gain energy, they spread out and expand to nearly 700 times its original volume. In a sealed setup like this, all that gas has nowhere to go but into the balloon. The pressure builds fast, inflating the balloon until it can’t stretch any further, ending in a l