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Question
A crystal of iodine is placed in a closed flat bottom flask and heated. State how you would conclude from the observations seen, that interparticle space is minimum in solids and maximum in gases.
Solution
Procedure:
A crystal of iodine is heated in a closed flask. The crystal containing ‘X’ no. of particles turns into vapours, which also contain ‘X’ no. of particles and fills the complete flask.
Conclusion:
- Particles of a solid [e.g. crystal of iodine] are more closely packed.
- Particles of a gas [e.g. vapours of iodine] are least closely packed and fill the flask completely.
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