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WorksheetsMatter and Energy Unit Test part 1
Total questions: 21
Worksheet time: 42mins
Which sample of matter has the greatest distance between molecules at STP?
1) N2(g)
2) NH3(aq)
3) C6H14(l)
C6H12O6(s)
The arrangement of particles is most ordered in a sample of
NaCl(aq)
NaCl(l)
NaCl(g)
NaCl(s)
Which phase change is an exothermic process?
CO2(s) --> CO2(g)
NH3(g) --> NH3(l)
Cu(s) --> Cu(l)
Hg(l) --> Hg(g)
Which form of energy is converted to thermal energy when propane burns in air?
electromagnetic
nuclear
electrical
chemical
Two grams of potassium chloride are completely dissolved in a sample of water in a beaker. This
solution is classified as
an element
a heterogeneous mixture
a homogeneous mixture
a compound
Which is a chemical property of water?
It freezes.
It decomposes.
It evaporates.
It boils.
Which term identifies a form of energy?
combustion
exothermic
thermal
electrolytic
Which sample of water contains particles having the highest average kinetic energy?
25 mL of water at 95°C
45 mL of water at 75°C
75 mL of water at 75°C
95 mL of water at 25°C
Which temperature is equal to 120. K?
–153°C
–120.°C
+293°C
+393°C
Which quantity is equal to 50 kilojoules?
0.05 J
500 J
5 × 103 J
5 × 104 J
Energy is being added to a given sample. Compared to the Celsius temperature of the sample, the
Kelvin temperature
will always be 273º greater
will always be 273º lower
will have the same reading at 0º
will have the same reading at 273º
Which statement is an identifying characteristic of a mixture?
A mixture can consist of a single element.
A mixture can be separated by physical means.
A mixture must have a definite composition by weight
A mixture must be homogeneous
When a mixture of water, sand, and salt is filtered, what passes through the filter paper?
water, only
water and sand, only
water and salt, only
water, sand, and salt
Equal amounts of ethanol and water are mixed at room temperature. Which process is used to separate ethanol from the mixture?
distillation
reduction
filtration
ionization
The laboratory process of distillation does not involve
changing a liquid to vapor
changing a vapor to liquid
liquids with different boiling points
liquids with the same boiling points
Given the diagram representing a process being used to separate the colored dyes in food coloring. Which process is represented by this diagram?
chromatography
electrolysis
distillation
titration
The graph represents the heating curve of a substance that starts as a solid below its freezing point.
What is the melting point of this substance?
30°C
55°C
90°C
120°C
The graph below shows the heating curve of 1.0 gram of a solid as it is heated at a constant rate, starting at a temperature below its melting point. Based on this graph, what is the heat of vaporization?
200 calories, as measured along line BC
250 calories, as measured along line BC
400 calories, as measured along line DE
800 calories, as measured along line DE
Which substance can not be broken down by chemical means?
aluminum (Al)
ammonia (NH3)
aluminum oxide (Al2O3)
ammonium chloride NH4Cl
Matter is classified as a
substance, only
substance or as a mixture of substances
homogenous mixture, only
homogenous mixture or as a heterogeneous mixture
Which two substances can be broken down by chemical change?
C and O
C and Cu
CO2 and CuO
O2 and Cu
