แผ่นงานheating curve
คำถามทั้งหมด: 25
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1.
What line segment represents only the solid state?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
2.
Between which points is the temperature of the substance remaining constant?
a)
A-B only.
b)
A-B, C-D, E-F
c)
B-C only.
d)
B-C, D-E
3.
In which segment is the kinetic energy remaining constant?
a)
A-B
b)
B-C
c)
C-D
d)
E-F
4.
A substance's heating curve is shown in the graph. What is its boiling point?
a)
100 C
b)
60 C
c)
80 C
d)
20 C
5.
The graph shows a cooling curve for an unknown substance. What is happening during segment DE?
a)
boiling
b)
condensation
c)
freezing
d)
melting
6.
A substance's heating curve is shown in the graph. What is its boiling point?
a)
100 C
b)
60 C
c)
80 C
d)
20 C
7.
Which of these conditions is always true for an exothermic process?
a)
They leave the surroundings feeling cold
b)
They release energy into the surroundings.
c)
They absorb energy from the surroundings
d)
The reactants gain energy as they form the products
8.
Which of the following terms identifies the change from a liquid to gas?
a)
Vaporization
b)
Condensation
c)
Deposition
d)
Sublimation
9.
The melting point of the sample is
a)
-60 ºC
b)
-100 ºC
c)
60 ºC
d)
100 ºC
10.
In which region(s) of the graph would the substance be melting?
a)
No melting occurs on this graph
b)
Region C-E
c)
Region E-G
d)
Region G-I
11.
Describe the substance between letters D and E.
a)
Gas
b)
Liquid
c)
Melting
d)
Evaporating
12.
Between which points is the temperature of the substance remaining constant?
a)
A-B only.
b)
A-B, C-D, E-F
c)
B-C only.
d)
B-C, D-E
13.
What state(s) of matter are present at D-E?
a)
Solid-liquid
b)
Liquid
c)
Liquid-gas
d)
Gas-Solid
14.
Describe the substance between letters E and F.
a)
Gas
b)
Liquid
c)
Melting
d)
Evaporating
15.
How many states of matter are present during line segment BC?
a)
One
b)
Two
c)
Three
d)
Depends on the temperature
16.
What is water's freezing point?
a)
0 F
b)
32 C
c)
50 C
d)
0 C
17.
My particles move the slowest.
a)
Solid
b)
liquid
c)
Gas
d)
Plasma
18.
I have a definite volume, but no definite shape
a)
Gas
b)
Liquid
c)
Plasma
d)
Solid
19.
In which region(s) does temperature increase?
a)
Region 1, 3, & 5
b)
Region 2 & 4
c)
Region 1 only
d)
Region 1 & 2
20.
In which region(s) of the graph would the substance only be in one phase?
a)
Region 1, 3, & 5
b)
Region 2 & 4
c)
Region 1 only
d)
Region 1 & 2
21.
Decreasing the temperature of something is called ______.
a)
heating
b)
cooling
c)
non-reversible change
d)
reversible change
22.
The melting point of the sample is
a)
-60 ºC
b)
-100 ºC
c)
60 ºC
d)
100 ºC
23.
Given the heating curve of a solid being heated at a constant rate, what is the boiling point of this substance?
a)
20°C
b)
50°C
c)
110°C
d)
170°C
24.
Given the heating curve of a solid being heated at a constant rate, how much total time was required to boil this substance after it reached its melting point?
a)
3 minutes
b)
4 minutes
c)
10 minutes
d)
14 minutes
25.
True or false: melting and freezing occur at the same temperature!
a)
True
b)
False
c)
I don't know
แป้นคำตอบheating curve
คำถามทั้งหมด: 25
1.
a) A-B
2.
d) B-C, D-E
3.
b) B-C
4.
b) 60 C
5.
c) freezing
6.
b) 60 C
7.
b) They release energy into the surroundings.
8.
a) Vaporization
9.
a)
-60 ºC
10.
a)
No melting occurs on this graph
11.
d) Evaporating
12.
d) B-C, D-E
13.
c) Liquid-gas
14.
a) Gas
15.
b) Two
16.
d) 0 C
17.
a) Solid
18.
b) Liquid
19.
a) Region 1, 3, & 5
20.
a) Region 1, 3, & 5
21.
b) cooling
22.
a)
-60 ºC
23.
c)
110°C
24.
b)
4 minutes
25.
a) True
140 %