【单选题】We should work hard and ( )our parents’ expectation.
【单选题】在恒容条件下有一定量的理想气体,当温度升高时,其热力学能将
【单选题】在恒容条件下化学反应:2SO 2 (g)+O 2 (g) 2SO 3 (g) ΔH='-Q' kJ·mol -1 。在上述条件下分别充入的气体和反应放出的热量(Q)如表所列: 根据以上数据,下列叙述正确的是( )
A.
在上述条件下反应生成1 mol SO 3 固体放热Q/2 kJ
【单选题】Peter Singer seems to suggest that
A.
we should cast away our logic and respect emotion in the first place.
B.
we should not only concern about ourselves but start help each other.
C.
people who live in abundance should give a hand to those in poverty.
D.
we should cut off life support for the old to achieve the utilitarian goals.
【判断题】运用盖斯定律进行热化学计算,可以在恒容条件下,也可以在恒压条件下进行。 ( )
【单选题】在恒容条件下化学反应: 2SO 2 ( g ) + O 2 ( g ) 2SO 3 ( g ) ; △ H =—QkJ·mol -1 在上述条件下分别充入的气体和反应放出的热量 ( Q )如下表所列: 容器 SO 2 (mol) O 2 (mol) N 2 (mol) Q(kJ·mol -1 ) 甲 2 1 0 Q 1 乙 1 0.5 0 Q 2 丙 1 0.5 1 Q 3 根据以上数据,下列叙述...
A.
在上述条件下反应生成 lmolSO 3 固体放热 Q/2 kJ
C.
Q l ='2' Q 2 = 2Q 3 = Q
【单选题】Helen Keller thought that it would be an excellent rule to live each day as if we should die tomorrow so that we would .
A.
pay less attention to the certainty of death
B.
eat, drink and be merry
C.
finish our petty tasks
D.
live our life with appreciation