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2002_1_CH101_Midsoln

# 2002_1_CH101_Midsoln - 2002 1(10 X d,e,i O a b c f g h j 1...

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2002 0 ( 0 ) (2002-5-23) 1. (10. ) X: d,e,i O: a, b, c, f, g, h, j (0 10 ) 2 . (10 ) a) total valence electrons = 2x5+6 = 16 1. electrons needed for octet = 3x8 =24 2. bonding electrons to share = 24-16 = 8, need 4 bonds 3. assign 8(=16-8) electrons to terminal atoms to have octet electrons (a) N N O ( A ) N N O ( B ) N N O ( C ) (4 ) (b)(3 ) N-N (112 pm) 8 §+ (120 pm)˜ ¡ §+ 0±ø ¹ ª* (110 pm)8± ø ª* . X±ø ª* 3 (C) ˆø (rule out) 0ˆø . (3 ) N 1 N 2 O N 1 N 2 O (c) FC of N 1 = 0 , N 2 = +1 , O = -1 ( A ) ( B ) FC of N 1 = -1 , N 2 = +1 , O = 0 (C ) FC of N1 =5-7= -2, N2 =5-4=+1, O=6-5=1 C3 A, B 2 8 / N 2, O +1 C3 ¹ A,B ¹ á wE 6 8 .(30 ) 3. (10. ) (a) (40 ) 0 ( 29 ( 29 ( 29 atm L K K mol atm L mol p 5 1 500 1 . 0 1 . 0 . 1 1 = = - - Van der Waals ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 atm L mol mol L atm L K K mol atm L mol p 95 . 4 1 1 . 0 5 1 500 1 . 0 1 . 0 2 2 2 2 1 1 = - = - - - (b) (3 ) z= PV/nRT = 1- an/VRT TX ø ¹ª 2 nd term <<1, z ~1, PV~ nRT (c) (3 ) P= nRT/(V-nb) –a(n/V) 2, P~1/(V-nb) nb , , repulsive interactionX± ¹ ª * 4.( 4 )

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8 § ² /ºª* \‰ . A k (intra-molecular) Bs ƒ j4§+ p Æ D ÿ Æ D ðy D `y (inter-molecular) x (2 ). @ ÆD [email protected] (force)˜ §+ ² / º ª packing ¨² / º B A k1 .(2 ) 5.(6 ) (a) (2 ) B:HCl (b) (2 )
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