Manipal MET2017ChemistryStates of Matter
What is the kinetic energy of 1 g of O ₂ at 47^ C ?
Options
- A2.17 10^2 ~J
- B2.24 10^2 ~J
- C1.24 10^2 ~J
- DNone of these
Correct answer
C. 1.24 10^2 ~J
Step-by-step solution
KE = 3 2 R T( for 1 ~mole ) Given, T=47+273=320 ~K KE = 3 2 8.314 320=3990.7 ~J ~mol ⁻¹ Molar mass of O ₂=32 ~g ~mol ⁻¹ aligned Molar mass of O ₂ & =32 ~g ~mol ⁻¹ KE ( per gram of O ₂ ) & = 3990.7 32 Jg ⁻¹ & =124.7 ~J ~g ⁻¹ & =1.24 10^2 ~J ~g ⁻¹ aligned