PROPERTIES OF SOLIDS LEC-1

As O_2 (I) is cooled at 1 atm pressure , it freezes to form solid I at 54.5 K. At a lower temperature , solid rearrange to solid II, which has a different crystal that for the phase transition solid to slid II , DeltaH=-743.1 Jmol^(-1) and DeltaS=-17.0JK^(-1) mol^(-1) . At what temperature are solids I and II in equilibrium ?

STATEMENT-1 : Sound travels faster in solids as compared to liquids and gases . STATEMENT-2 : Solids are more elastic than liquids and gases .

Calculate the volume occupied at 27^(@)C and 2 bar pressure of a gas evolved from 2 mL of solid carbon dioxide. Given the density of solid carbon dioxide is 1.53 g mL^(-1) .

Evaluate using properties of whole numbers: 611-:1

Evaluate using properties of whole numbers: 899-:1

STATEMENT -1 : Amorphous solids are isotropic STATEMENT -2 : Amorphous solids lack a regular three-dimensional arrangement of atoms.