Physics

Problem

10.5 Two ideal gas thermometers

A

and

B

use oxygen and hydrogen respectively. The following observations are made:

Temperature	Pressure <br> thermometer A	Pressure <br> thermometer B
Triple-point of water	$1.250 \times 10^{5} \mathrm{~Pa}$	$0.200 \times 10^{5} \mathrm{~Pa}$
Normal melting point <br> of sulphur	$1.797 \times 10^{5} \mathrm{~Pa}$	$0.287 \times 10^{5} \mathrm{~Pa}$

(a) What is the absolute temperature of normal melting point of sulphur as read by thermometers

A

and

B

? (b) What do you think is the reason behind the slight difference in answers of thermometers

A

and

B

? (The thermometers are not faulty). What further procedure is needed in the experiment to reduce the discrepancy between the two readings?