23. Which statement is true of a process in which 1 mol of a gas is expanded from state A to state B?
(B) the amount of work done in the process must be the same, regardless of the path.
请问这句话哪里错了?
40. What compounds ore useful in breathing apparatus and air supply packs?
(A) oxides (B) peroxides (C) superoxides (D) alkali metals (E) none of these
答案是(C)
可是我找不到 superoxides和 breathing apparatus的关联何在(作用机制等等)?
麻烦各位为我解惑 > <