Consider an ideal gas enclosed in a 1.00 l container at an internal pressure of 10.0 atm. calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 25.0 l. i understood how to do this first paer of the did 1atm * 24l = 24.0jthen did -24*101.325= -2431.8it is the second part of the question i do not calculate the work done if this process is carried out in two steps. 1. first, let the gas expand against a constant external pressure of 5.00 atm to a volume of 5.00 l. 2. from there, let the gas expand to 25.0 l against a constant external pressure of 1.00 atm. the answer is -4040 but how do you get that answer?

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.