Final answer:
Raoult's Law is a suitable method to estimate the final pressure when mixing two streams with different temperatures and pressures. It states that the partial pressure of each component in the solution is equal to the vapor pressure of that component multiplied by its mole fraction. By calculating and summing the vapor pressures, the final pressure can be determined.
Step-by-step explanation:
Raoult's Law is indeed a suitable method to estimate the final pressure when two material streams at different temperatures and pressures are mixed. Raoult's Law states that the partial pressure exerted by any component of an ideal solution is equal to the vapor pressure of the pure component multiplied by its mole fraction in the solution. By calculating the vapor pressures of each component separately and summing them, you can determine the final pressure of the mixed streams.