The Pressurized Coffee Thermos · AI Generator #GEN-7CAFF44B
Physics · thermodynamics
Problem
A coffee thermos is designed with a small pressure relief valve to prevent dangerous pressure buildup. When hot coffee at T1=90°C is poured into the thermos and the lid is sealed, the air space above the coffee is at atmospheric pressure P0=1.01×105Pa. As the coffee cools to room temperature T2=20°C, the air pressure inside decreases. If the thermos were perfectly rigid and sealed (no pressure relief), what would be the final pressure of the air inside the thermos? Assume the air behaves as an ideal gas and the volume of the air space remains constant.