9) Identify the hydrogen that will react the fastest in a radical hal ogenation reaction. CH3 CHy A) hydrogen 1 B) hydrogen2 C) hydrogen3 D) hydrogen 4 E) hydrogen 5 10) Which of the following correctly describes the reaction shown? CH,CH,Br heat 11) An increase in which of the following will occur if the reaction temperature is incr eased? I. Energy of activation Il. Collision frequency IlI. Fraction of collisions with sufficient energy A) I and III B) I C) II and IIl D) I, II, and I1 E I and II 12) An incr ease in which of the following results in a decrease in the rate of the chemical reection? A) temperature B) fraction of collisions with proper orientation C) collision frequency D) concentration E energy of adtivation
Solution
9) a. Hydrogen 1. 1degree radical is most stable and it is farthest from substituents
10) a. delta H<0,delta S<0 because heat is releasing and phase change (gas+liquid?liquid) happening.
11) c. 2nd and 3rd because on increase in temperature no of collision increases,and energy of molecules also increases.
12) d. Energy of activation ,rate of reaction is decreases as energy of activation increases.increased energy of activation means higher energy required for reaction.
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9) Identify the hydrogen that will react the fastest in a radical hal.docx
1. 9) Identify the hydrogen that will react the fastest in a radical hal ogenation reaction. CH3 CHy
A) hydrogen 1 B) hydrogen2 C) hydrogen3 D) hydrogen 4 E) hydrogen 5 10) Which of the
following correctly describes the reaction shown? CH,CH,Br heat 11) An increase in which of
the following will occur if the reaction temperature is incr eased? I. Energy of activation Il.
Collision frequency IlI. Fraction of collisions with sufficient energy A) I and III B) I C) II and IIl
D) I, II, and I1 E I and II 12) An incr ease in which of the following results in a decrease in the
rate of the chemical reection? A) temperature B) fraction of collisions with proper orientation C)
collision frequency D) concentration E energy of adtivation
Solution
9) a. Hydrogen 1. 1degree radical is most stable and it is farthest from substituents
10) a. delta H<0,delta S<0 because heat is releasing and phase change (gas+liquid?liquid)
happening.
11) c. 2nd and 3rd because on increase in temperature no of collision increases,and energy of
molecules also increases.
12) d. Energy of activation ,rate of reaction is decreases as energy of activation
increases.increased energy of activation means higher energy required for reaction.
