乙醇气体脱水制乙烯,反应为: C 2 H 5 OH( g ) C 2 H 4 ( g ) +H 2 O( g ) 试计算 298K 的 。 (2)若将反应写成: 2 C 2 H 5 OH( g ) 2 C 2 H 4 ( g ) +2H 2 O( g ), 则 298K 的 ∆ r S 又是多少? 物 质 C 2 H 5 OH( g ) C 2 H 4 ( g ) H 2 O( g ) J/ ( K · mol) 282.70 219.56 188 . 83
【简答题】The ratio of operating cash flow to net income (the cash flow earnings index) would least likely be an “accounting red flag” when it is: A. less than one. B. declining over time. C. highly variable.