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1.5 The table below lists the observed values of the pressure P of a gas in a
constant-volume gas thermometer at an unknown temperature and at
the triple point of water as the mass of gas used is reduced.
P (torr) 100
200
300
400
P (torr) 127.9 256.5 385.8 516
By considering the limit Pan (P/P) determine 7 to two decimal
places. What is this in °C? (1 torr is a pressure of 1 mm of Hg).

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