【单选题】在 732K 时反应 NH 4 Cl(s) = NH 3 (g) + HCl(g) 的 Δ r G m θ 为- 20.8kJ . mol -1 , Δ r H m θ 为 154kJ·mol -1 ,则反应的 Δ r S m θ 为:
【判断题】场外箱场内查验信息录入时,信息预录和进箱计划是同时进行。 ( )
【单选题】You spent $500 last week fixing the transmission in your car. Now, the brakes are acting up and you are trying to decide whether to fix them or trade the car in for a newer model. In analyzing the bra...
【单选题】In analyzing whether to replace or keep existing equipment, the cost of the new equipment _____.
A.
is irrelevant because it is a historical cost
B.
is relevant because equipment is always relevant
C.
represents a future cost that will differ between the options of replacing or keeping the equipment
【简答题】在 732K 时,反应 NH 4 Cl(s)==NH 3 (g)+HCl(g) 的 D r G = - 20.8kJ · mol -1 , D r H =154kJ · mol -1 ,则该反应的 D r S = 。
【单选题】In fact a Ghanaian woman has on an average ______ children.
【单选题】在732 K时反应NH4Cl(s)=NH3(g)+HCl(g)的ΔfGmΘ为-20.8 kJmol-1, ΔrHmΘ为154 kJmol-1, 则反应的ΔrSmΘ为:
【单选题】在732K时反应NH 4 Cl(s) = NH 3 (g) + HCl(g)的 D r G m $ 为-20.8kJ . mol -1 , D r H m $ 为154kJ · mol -1 ,则反应的 D r S m $ 为:
B.
0.239J · K -1 · mol -1
D.
0.182J · K -1 · mol -1
【单选题】3-1-18 、 在异步串行传输系统中,假设波特率为1200bps,其字符格式为:1为起始位,8位数据位,1位奇偶校验位,1位终止位,则其比特率为 bps。
【单选题】在 732K 时反应 NH 4 Cl(s)=NH 3 (g)+HCl(g) 的 △ r G 为 -20.8kJ·mol -1 , △ r H 为 154kJ·mol -1 , 则反应的 △ r S 为 ( )J·mol -1 ·K -1