973K時(shí),反應(yīng):CO(g)+H2O(g)≒CO2(g)+H2(g)的Kθ=1.56,問(wèn): (1)973K,標(biāo)準(zhǔn)狀態(tài)下,反應(yīng)是否自發(fā)? (2)若p(CO2)=p(H2)=1.27×105Pa,p(CO)=p(H2O)=0.76×105Pa,反應(yīng)是否自發(fā)?
試計(jì)算下列各電極對(duì)在298k時(shí),在給定的條件下的電極電勢(shì):
計(jì)算說(shuō)明在pH=4.0時(shí),下列反應(yīng)能否自動(dòng)進(jìn)行(其余物質(zhì)均處于標(biāo)準(zhǔn)狀態(tài)):