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Propane gas is a commonly used heating fuel for gas grills and homes. However, it is not packaged as a gas. It is liquefied and referred to as liquid propane or "LP gas." Make a poster explaining the advantages and disadvantages of storing and transporting propane as a liquid rather than a gas.

Other States of Matter Research and prepare an oral report about one of the following topics: plasma, superfluids, fermionic condensate, or Bose-Einstein condensate. Share your report with your classmates and prepare a visual aid that can be used to explain your topic.

Jodine Solid iodine that is left at room temperature subli- mates from a solid to a gas. But when heated quickly, a different process takes place, as described here. "About 1 g of iodine crystals is placed in a sealed glass ampoule and gently heated on a hot plate. A layer of purple gas is formed at the bottom, and the iodine liquefies. If one tilts the tube, this liquid flows along the wall as a narrow stream and solidifies very quickly". $$\begin{array}{l}{\text { Why does solid iodine sublime readily? Use your }} \\\ {\text { knowledge of intermolecular forces to explain. }}\end{array}$$

Jodine Solid iodine that is left at room temperature subli- mates from a solid to a gas. But when heated quickly, a different process takes place, as described here. "About 1 g of iodine crystals is placed in a sealed glass ampoule and gently heated on a hot plate. A layer of purple gas is formed at the bottom, and the iodine liquefies. If one tilts the tube, this liquid flows along the wall as a narrow stream and solidifies very quickly". $$\begin{array}{l}{\text { Why is liquid iodine not usually visible if crystals are }} \\ {\text { heated in the open air? }}\end{array}$$

Jodine Solid iodine that is left at room temperature subli- mates from a solid to a gas. But when heated quickly, a different process takes place, as described here. "About 1 g of iodine crystals is placed in a sealed glass ampoule and gently heated on a hot plate. A layer of purple gas is formed at the bottom, and the iodine liquefies. If one tilts the tube, this liquid flows along the wall as a narrow stream and solidifies very quickly". $$\begin{array}{l}{\text { Why is it necessary to use a sealed ampoule in this }} \\ {\text { investigation? }}\end{array}$$