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efines the t
is a measu c energy of t is a measu
of the parti a measur y of the part a measur f the partic
tion, the dif gy of the p the reactan
y of the for y of the rev
presents sub (3) N (g) (4) C
escribes th the kinetic
the gas pa es have no
les are larg g them.
icles collide,
emperature of a
re of the total he particles.
re of the total cles.
of the average icles.
of the average les.
ference between roducts and the s is equal to the
ward reaction erse reaction
limation?
H (g)→NH (l) 33
18 Powdered sulfur is yellow, and powdered iron is gray. When powdered sulfur and powdered iron are mixed at 20°C, the powdered iron
(1) becomes yellow (3) remains ionic
Sample Regents Questions
(2) becomes a liquid
(4) remains magnetic
19 An effective collision between reactant particles requires the particles to have the proper
(1) charge and mass
(2) charge and orientation (3) energy and mass
(4) energy and orientation
20 Which term is defined as a measure of the
disorder of a system?
June 2013 # 19
(1) heat (3) kinetic energy (2) entropy (4) activation energy
Answer: Choice #4
(1) chromatography
(3) electrolysis
H4(l) → CH4(g)
Explanation: Effective collisions need the right amount of energy and
e particles of an
(2) distillation
(4) titration
orientation. 22 The compounds CH OCH and CH CH OH olecular theory? 3332
rticles is orderly attractive forces er than the dis- the total energy
have different functional groups. Therefore, these compounds have different
(1) chemical properties
(2) gram-formula masses
(3) percent compositions by mass (4) numbers of atoms per molecule
Answer
21 Which process is used to determine the concen- tration of an acid?
d
y se
se o
c
t
n g g
) O
d
m
l n
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