The Gas expands at constant pressure p=6,2.10⁵ Pa from volume V₁=3,2.10⁻³ m³ to volume V₂=5,2,10⁻³m³. How much work has been done by the gas?

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system