Verified answer

This video should help - http://www.youtube.com/watch?v=WsHq6Y_xTRg

Quartz is a solid so gas laws are inappropriate.

Volumetric coefficient of thermal expansion is 1.77 x 10^(-6) per degree C (at 20C)

Delta V/ V = k x Delta T

V= 4/3*Pi*7^3=1436.76 cm^3

thus,

Delta V / 1436.76 = 1.77 x 10^(-6) x (220-50)

Delta V = 0.43 cm^3

Note - the value for k is that at 20C, so some error will apply.

I believe the different answerers. you could't anticipate a pragmatic answer in case you do no longer supply gadgets: a) for diameter 9.ninety two mm?cm?m? Inches? Who knows -least of all we who attempt to respond to for you. b) temperature will improve from 30 to 2 hundred what? ok? °C? °F? C) do you anticipate us to do each and all the artwork and seek for the coefficient of thermal boom of quartz for you? a minimum of you have gotten made some attempt to help your self.

Unless i am missing something here what has the gas laws got to do with it as it is a mineral