16807. A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is September 13, 2025 by Admin 30 kJ 54 kJ 84 kJ 114 kJ ✅ The correct answer is option B.