Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 10 - Questions and Problems - Page 470: 10.9

Answer

$Cl_2$ gas and $I_2$ vapor

Work Step by Step

A substance is declared gas when it is above its boiling point at room temperature whereas a vapor means the gaseous state of a substance which is normally solid or liquid at room temperature. $Cl_2$ is gas at room temperature as it is above its boiling point at $25C^{\circ}$ while $I_2$ is in vapor form because it is solid at $25C^{\circ}$.
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