Applying the First Law to Real Processes by Horiya BOUKHATEM - Sunday, 14 December 2025, 9:12 PM Number of replies: 0 A gas is compressed rapidly in an insulated cylinder. · Is this process isothermal, adiabatic, or something else? · What happens to ΔU, Q, and W? · Does the temperature increase, decrease, or stay the same? Permalink