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A volatile solid material is placed in a tube and vacuum is created inside the tube. If the tube is heated and the solid vaporizes the weight of the material + tube will

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A volatile solid material is placed in a tube and vacuum is created inside the tube. If the tube is heated and the solid vaporizes the weight of the material + tube will

(a) Decrease

(b) Increase

(c) Remains same

(d) None of the mentioned

The question was posed to me in examination.

This key question is from Material Balances -III topic in chapter Material Balances of Chemical Process Calculation

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Right answer is (c) Remains same

For explanation I would say: Apply mass conservation.

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