- #1

vcsharp2003

- 800

- 169

- Homework Statement:
- The problem is as given in screenshot below. I am unable to correctly answer part (b) of the question.

- Relevant Equations:
- ##\frac {P_1} {T_1} = \frac {P_2} {T_1}## where ##P_1## and ##P_2## denote pressures at temperatures ##T_1## and ##T_2## for a constant volume ideal gas

I am able to solve part (a) using the relationship ##\frac {P_1} {T_1} = \frac {P_2} {T_1}##, where ##T_1 = 273.16## since its the triple point of water and ##T_2 =T_s## ##(T_s = ## melting point of sulphur). I use the two readings for thermometer A to get ##P_1## and ##P_2## as mentioned in the first column under

**Pressure thermometer A**.

I use the same approach as above for thermometer B using the readings mentioned in the second column under

**Pressure thermometer B**.

I get correct answers. For thermometer A, ##T_s = 392.69## K and for thermometer B, ##T_s = 391.98## K

For part (b), I am not very clear. The difference in readings could be due to parallax error or observation error by the person using the gas thermometer. But, I'm not sure if there is more to this part (b) answer. Also, I cannot come up with any answer to reduce the difference in ##T_s## determined by thermometers A and B since parallax error or observation error is hard to minimize in an objective manner. In other words, the discrepancy in the two readings in unavoidable and will happen randomly.

Also, my understanding of what a gas thermometer is as shown in the screenshot below.