The enthalpy of vaporization of Substance x is 25.0 and its normal boiling kJ mol point is 101. °c. Calculate the vapor pressure of x at -187. °C. Round your answer to 2 significant digits. atm Explanation Check 0 x10 ? ⠀ alla Ar Ⓒ2023 McGraw HIII LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility (

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.