用定容气体温度计测量某种物质的沸点。原来测温泡在水的三相点时，其中气体的压强<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414103059998.jpg?sign=9792e8cb08fcc2b061b1198784f80ffe&t=62d697bf" />当测温泡浸入待测物质中时，测得的压强值为<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414105326947.jpg?sign=19312002e9f95794844281e3bc26e58e&t=62d697bf" />当从测温泡中抽出一些气体，使<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414111254232.jpg?sign=264c181385990e30eac5aa1886c13e13&t=62d697bf" />减为200mmHg时，重新测得<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414113036349.jpg?sign=411a87f3e0aae19b527a23e093b4e788&t=62d697bf" />当再抽出一些气体使<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414120245894.jpg?sign=bf5d7150d779abc8d6faf4c8c51556d9&t=62d697bf" />减为100mmHg时，测得<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414122014832.jpg?sign=e37fd3db3a1464671cfa2ba5051665ec&t=62d697bf" />试确定待测沸点的理想气体温度。