18. Given the following two reactions at 298 K and 1 atm, which of the statements is true?
(A) △Hf for NO2(g) =△H2+(1/2)△H1
(B) △H1 = △H2
(C)△Hf for NO(g) = △H1
(D) △Hf for NO2(g) = △H2)
(E) none of these
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統計: A(16), B(0), C(1), D(1), E(1) #2735506
統計: A(16), B(0), C(1), D(1), E(1) #2735506