Page 505 - Chemistry eBook

om temperature?
(3) silver (4) zinc
ionic equation: s) → 3Pb(s) 􏰂
of moles of elec ions?
(3) 3.0 m (4) 6.0 m
t of heat ene water is cooled
(3) 1.67 􏰁 (4) 1.13 􏰁
fusion? (1)3H→3He􏰂 0e
2Cr3􏰂(aq) trons gained
ol ol
rgy released from 20.0°C
105 J 106 J
(4) 235U􏰂1n→90Sr􏰂143Xe􏰂31n 92 0 38 54 0
1 2 235
􏰀1
(2) 92U → 90Th 􏰂 2He (3) 2H􏰂2H→4He
112
231
4
Sample Regents Questions
50 Which reaction releases the greatest amount of energy per kilogram of reactants?
(1) 1n􏰂235U→141Ba􏰂92Kr􏰂31n 0 92 56 36 0
(2) 2C􏰂H2 →C2H2
(3) C3H8(g) 􏰂 5O2(g) → 3CO2(g) 􏰂 4H2O(l)
(4) NaOH(aq)􏰂HCl(aq)→NaCl(aq)􏰂H2O(l)
Jan 2014 #50
[7] Answer [OVER] Choice #1
Explanation: Choice #1 is a nuclear reaction (recognize that this is a nuclear reaction). Nuclear reactions release more energy than any other type of reaction.
(
n
UNIT 12: NUCLEAR CHEMISTRY © 504