單項(xiàng)選擇題已知298K時(shí),NH3(g)的ΔfHmΘ= –46.19 kJ·mol–1,反應(yīng)N2(g)+3H2(g) ===2NH3(g)的ΔrSmΘ=–198 J·mol–1·K–1,欲使此反應(yīng)在標(biāo)準(zhǔn)態(tài)下能自發(fā)進(jìn)行,所需溫度為()

A.<193 K
B.<466 K
C.>193 K
D.466 K


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