[MCAT Question of the Day, Click Display Images To See] + Join us on Facebook<http://mcatquestionoftheday.us4.list-manage.com/track/click?u=d3318065969b7c08ead5d4c4d&id=4189caa3ec&e=61d7ba7392> + Connect on Twitter<http://mcatquestionoftheday.us4.list-manage.com/track/click?u=d3318065969b7c08ead5d4c4d&id=0b095b3dac&e=61d7ba7392> Know Your Thermo Describe the reaction below: PCl3(g) + Cl2(g) -> PCl5(g) ; Delta(Hf) = -87.9kJ/mol A. spontaneous at all temperatures. B. nonspontaneous at all temperatures. C. ΔGrxn is less than 0 at only low temperatures. D. spontaneous at only high temperatures. To see the solution, visit the following link: http://mcatquestionoftheday.com/chemistry/know-your-thermo/<http://mcatquestionoftheday.us4.list-manage.com/track/click?u=d3318065969b7c08ead5d4c4d&id=9dd6121deb&e=61d7ba7392>