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¢Å Rb(s) = Rb(g) ¦¤rHm?¢Å = 78 kJ¡¤mol1

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¢Æ Rb(g) = Rb+(g) + e- ¦¤rHm?¢Æ = 402 kJ¡¤mol1

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¢Ç F2(g) = 2F(g) ¦¤rHm?¢Ç = 160 kJ¡¤mol1

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¢È F(g) + e- = F-(g) ¦¤rHm?¢È = -328 kJ¡¤mol1

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¢É F2(g) +2Rb(s) = 2RbF(s) ¦¤rHm?¢É = -1104 kJ¡¤mol1

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9.28ÒÑÖªNaF¾§ÌåµÄ¾§¸ñÄÜΪ915 kJ¡¤mol1£¬NaÔ­×ӵĵçÀëÄÜΪ496 kJ¡¤mol1£¬½ðÊôÄÆ

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9.29 AgCl£¬AgBr£¬AglµÄ²â¶¨¼ü³¤±ÈËüÃǵÄr(Ag+)Óër(X-)Ö®ºÍ¶ÌÁËÐí¶à£¬Õâ˵Ã÷ÁËʲô? 9.30 Ag+ÓëK+°ë¾¶ºÜ½Ó½ü£¬µ«KBrÒ×ÈÜÓÚË®¶øAgBrÈ´ÄÑÈÜÓÚË®¡£ÊÔÓÃÀë×Ó¼«»¯ÀíÂÛ½âÊÍÖ®¡£

9.31Ö¸³öÏÂÁи÷×éÀë×ÓÖУ¬ºÎÕß¼«»¯ÂÊ×î´ó£¿ ¢Å Na+£¬I-£¬Rb+£¬Cl- ¢Æ O2-£¬F-£¬S2-

9.32ÏÂÁйÌ̬ÎïÖʵĻ¯Ñ§Ê½ÈçÏ£¬Ö¸³öËüÃÇ·ÖÊôÓÚºÎÖÖ¹¹Ð͵ľ§Ì壺

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9.34ÊÔ¸ù¾Ý¾§ÌåµÄ¹¹ÐÍÓë°ë¾¶±ÈµÄ¹Øϵ£¬ÅжÏÏÂÁÐABÐÍÀë×Ó»¯ºÏÎïµÄ¾§Ìå¹¹ÐÍ£º BeO£¬NaBr£¬CaS£¬RbI£¬BeS£¬CsBr£¬AgCl

9.35ÊÔÅжÏÔÚNaCl¡¢Si¡¢O2¡¢HClµÈ¾§ÌåÖУ¬ÄĸöÈÛµã×î¸ß£¿Äĸö×îµÍ£¿ 9.36ÈçºÎ½âÊÍMgCl2µÄ¾§¸ñÄÜ´óÓÚNaClµÄ¾§¸ñÄÜ£¿ 9.37 ±È½ÏCaF2¡¢BaCl2¡¢MgOµÄÈÛµã¸ßµÍ¡£ 9.38 ±È½ÏSiC¡¢SiF4¡¢SiCl4¡¢SiBr4µÄÈÛµã¸ßµÍ¡£ 9.39¸ù¾Ý½á¹¹½âÊÍÏÂÁÐÊÂʵ£º

¢Å ʯī±È½ð¸ÕʯÈíµÃ¶à£» ¢Æ ÓëSO2Ïà±È£¬SiO2µÄÈÛ¡¢·Ðµã¸ßµÃ¶à¡£ 9.40¸ù¾ÝÏÂÁÐÎïÖʵÄÐÔÖÊ,ÅжÏËüÃÇÊÇÊôÓÚºÎÖÖÀàÐ͵ľ§Ìå¡£ ¢Å CaCO3¾§ÌåµÄÓ²¶È¸ß£¬ÔÚ1173KʱÉÐδÈÛÈÚ¾ÍÒѷֽ⡣ ¢Æ BµÄÓ²¶È¼«¸ß£¬ÈÛµãΪ2573K£¬µ¼µçÐԺܲ ¢Ç SnCl4ÈÛµãΪ240K£¬·ÐµãΪ387K¡£ 9.41Ìî³äÏÂ±í£º Îï ÖÊ ¾§¸ñÖʵãµÄÖÖÀà Öʵã¼äµÄÁ¬½áÁ¦ ¾§¸ñÀàÐÍ ÈÛµã¸ßµÍ 11

KCl N2 SiC NH3 Ag 9.42°ÑÏÂÁÐÎïÖÊ°´Àë×Ó¾§Ìå¡¢·Ö×Ó¾§Ìå¡¢Ô­×Ó¾§ÌåºÍ½ðÊô¾§Ìå·ÖÀࣺ

¢Å ÊÇÒ»ÖÖ¸ßÈ۵㣨ÈÛµã1100¡æ£©µÄ¹ÌÌ壬50gµÄ¸Ã¹ÌÌåÄÜÍêÈ«ÈÜÓÚ100gË®ÖУ» ¢Æ ÊÇÒ»ÖÖ¸ßÈÛµã¹ÌÌ壬²»ÈÜÓÚË®£¬ÊÇÈȵÄÁ¼µ¼Ì壻 ¢Ç ÔÚ25¡æºÍp?ÏÂÊÇÒ»ÖÖÆøÌ壻

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9.43 The ion Ni2+ would have electron configuration: ( ) (A)£®[Ar] 3d54s2£»(B)£®[Ar] 3d8£»(C)£®[Ar] 3d74s2£»(D)£®[Ar] 3d64s2 9.44 For the reactions:

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CH4(g) ¡ú C(g) + 4H(g); ¦¤H?= 94.3 kJ¡¤mol1

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H2C=CH2(g) ¡ú 2C(g) + 4H(g); ¦¤H?= 129.2 kJ¡¤mol1

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The C=C bond energy, in kJ¡¤mol1, is ( )

(A)£®-34.9£»(B)£®23.7£»(C)£®+34.9£»(D)£®40.6

9.45 The fact that BeF2 molecule is linear implies that the Be-F bonds involve ( ) (A)£®sp hybrids£»(B)£®sp2 hybrids£»(C)£®sp3 hybrids£»(D)£®resonance

9.46 Indicate which one of the following is definitely polar: ( ) (A)£®O2£»(B)£®CO2£»(C)£®BF3£»(D)£®C2H3F

9.47 The electrons generally involved in bonding ( ) (A)£®are these that lie closest to the nucleus£»

(B)£®are those for which the ionization energies are small£» (C)£®end up being transferred from one atom to another£» (D)£®occupys atomic orbitals

9.48 Give the electron configurations of

¢Å Cr2+ ¢Æ Co3+ ¢Ç Mg2+ ¢È N3+

9.49 What kind of attractive forces (in addition to dispersion forces) would have to be overcome to

¢Å melt ice?

¢Æ dissolve NaCl in water?

¢Ç decompose MgCO3 to MgO?

9.50 Which would be the higher-melting substance in each of the following pairs? (The first two pairs are ionic, the others molecular.)

¢Å NaF or MgO ¢Æ MgO or BaO ¢Ç NH3 or PH3 ¢È PH3 of SbH3

9.51 Explain in terms of structure why

12

¢Å graphite is much softer than diamond. ¢Æ Cl2 has a higher boiling point than F2. ¢Ç NaCl becomes a conductor when it melts. ¢È metals are good reflectors of light.

9.52 What are the three important types of hybrid orbitals that can be formed by an atom with only s and p orbitals in its valence shell? Describe the molecular geometry that each of these produces.

9.53 For the series of diatomics O2+, O2, O2-, and O22-, determine from an MO energylevel diagram how the bond lengths will vary and how many unpaired electrons each should have.

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