@表山手学花 省级精品课程申报 to find the heat of reaction for 2 NO(g)+O2 (g)=N2O(g)....... (注：thermochemical equations-一热化学方程式) 解：③=②-① A,Hm3 =A,Hm2-A,Hm.=-114.14 kJ-mor-57.20 kJ-mor=-171.34 kJ-mor 28 Find the heat of reaction for CH(g)+4F2(g)=CF(g)+4HF(g) using the following heat-of-formation data:(CF)=-925 kJ.mor,(HF)=-271.1 kJ-mor',Arm CHa)=-74.81 kJ.mor,Am(F2)=0 kJ-mor'. 解：△Hme=△rHme(CFa)+4△rHme(HF)-△rHme(CH)-4△rHme(F2) --925 kJ-mor+4x (-271.1 kJ-mor)-(-74.81 kJ.mol)-4x0 kJ-mor =-1935 kJ.morl 29.At 298.15K,each substance ofm and Sm of the reaction separately is: Ag06=2Ag0+20,g △Hm9(kJ·mor-31.0 0 0 Sm (J.K.mor')121.0 42.7 205.3 Calculate Ar Gm and K of the reaction at 298.15K. 解： 由题意知，该反应的 A(Ag,)+(Oz,g)-All (Ag:O.s) =0-(-31.0)=31.0kJ·mor A59=25.P(Ag,+号500,8-5.9g0） =2×42.7+号×205.3-121.0=67.05JK1.m0r 根据△，Gm9=△，Hm9-T△Sm9,代入数据得： 4,Gm9=31.0×1000-298.15×67.05=11009J·mor 由△，Gm9=-RTn,代入数据，得： 11009 hK2=834X29815=44 K°=0.0118