Chapter 8, Problem 43RQ

A spacecraft is equipped with nine sensors, designed to gather data to attempt to reconstruct how the Martian planet may have lost its atmosphere. A reaction vessel is used as part of a chemical analysis process. The chemical reaction proceeds most efficiently at a temperature of 27 degrees Celsius [°C]. The 1.2-gallon [gal] reactor initially contains 0.3 moles [mol] of an ideal gas at a pressure of 1.95 atmospheres [atm]. To reach the ideal temperature for the reaction, the pressure in the reactor will be changed from the current conditions, while the volume and amount will remain constant. Determine the change (increase or decrease) in the pressure of the reactor in units of pascals [Pa] necessary to allow the reaction to proceed at the most efficient temperature.