1. Hydrogen gas was cooled from 150∘C to 50∘C. Its new volume is 125 mL. What was its original volume?
V1=V2×T1T2=125mL×423.15K323.15K
Step 1 :T1=150∘C=423.15K
Step 2 :T2=50∘C=323.15K
Step 3 :V1=V2×T1T2=125mL×423.15K323.15K