At the triple point of water the pressure of a fixed mass of gas is 2680Pa.The temperature is changed to T*

Question

* while the volume of the gas is kept constant.The pressure is then 4870Pa

a) Find the value of T

b) What is the advantage of making this determinantion at such a low pressure?

Answer 1

What's the volume for the fixed gas mass? If you knew it, I think you could just use the formula for combined gas laws; PV/T=K. But I'm not sure, just guessing. :)