Answer :

(a) We know that the triple point of water, T0 = 273.16 K.


At this temperature, pressure in thermometer A,


PA = 1.250 × 105 Pa


Let T be the normal melting point of sulphur.


At this temperature, pressure in thermometer A,


P = 1.797 × 105 Pa


According to Charles’ law,


PA/T0 = P/T


T = (PT0)/PA


T = (1.797×105 Pa × 273.16 K)/(1.250×105 Pa)


T = 392.69 K


Therefore, the absolute temperature corresponding to the normal melting point of sulphur according to the reading of thermometer A is 392.69 K.


At triple point T0 = 273.16 K, the pressure in thermometer B,


PB = 0.200×105 Pa


At temperature T, the pressure in thermometer B,


P’ = 0.287 × 105 Pa


According to Charles’ law,


PB/T0 = P’/T


(0.200 × 105 Pa)/(273.16 K)= (0.287 × 105 Pa)/T


T = [(0.287 × 105 Pa)/(0.200 × 105 Pa)] × 273.16 K


T = 391.98 K


Therefore, the absolute temperature corresponding to the normal melting point of sulphur according to the reading of thermometer B is 391.98 K.


(b) The oxygen and hydrogen gases used in thermometers A and B respectively are not ideal gases. These gases have different physical behaviours. Hence, there is a slight difference between the readings of thermometers A and B. To reduce the discrepancy between the two readings, the experiment should be carried under low pressure conditions. At low pressure, these gases behave as ideal gases and will show same characteristics.


NOTE: Ideal gases are those gases which follow ideal gas equation exactly.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Calculate the strPhysics - Exemplar

We would like to Physics - Exemplar

<span lang="EN-USPhysics - Exemplar

We would liPhysics - Exemplar

A thin rod havingPhysics - Exemplar

Answer the followNCERT - Physics Part-II

A brass rod of leNCERT - Physics Part-II

Two ideal gas theNCERT - Physics Part-II

Answer the followNCERT - Physics Part-II

A brass wire 1.8 NCERT - Physics Part-II