[ 499 ] Physical Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Which is the highest pressure at which the reaction can be run while still guaranteeing a less than 55% ammonia yield? A. 100 atm B. 200 atm C. 300 atm D. 400 atm Which is the highest temperature at which the reaction can be run while still guaranteeing a lower than 26% ammonia yield? A. 350°C B. 400°C C. 500°C D. 550°C When considering ammonia production, what are the best conditions at which to run the Haber reaction? ____ atm at ___°C