A 1.0-gram sample of solid iodine is placed in a tube and the tube is sealed after all of the air is removed. The tube and the solid iodine together weigh 27.0 grams. The tube is then heated until all of the iodine evaporates and the tube is filled with iodine gas. What will the weight of the sealed tube now filled with iodine gas?

As tube is closed therefore mole of gas is enclosed in a tube, thus it will only converted into gas ( Iodine Gas). In the gas form it will going to exert pressure on the wall of a tube. From conservation of mass principle weight of tube remain same, there will be no change in the weight of gas. therefore weight of sealed tube that is filled with iodine gas is 27 gm

oladayoademosu oladayoademosu · Answer 2 · 2022-04-19T11:28:06+02:00

The weight of the sealed tube now filled with iodine gas is 27.0 grams.

Since the iodine in the sealed tube is heated, we need to know the mass of the iodine gas after the solid iodine evaporates. We know this through the law of conservation of mass.

What is the law of conservation of mass?

The law of conservation of mass states that in any chemical reaction, matter is neither created nor destroyed.

What is the weight of the sealed tube?

From this, we see that since all the iodine solid is converted to iodine gas and the mass of the iodine solid plus tube is 27.0 grams, so, after the chemical reaction, the mass of iodine gas plus tube will also be 27.0 grams.

So, the weight of the sealed tube now filled with iodine gas is 27.0 grams.

Learn more about law of conservation of mass (weight) here:

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