WorksheetsThermochemistry
Total questions: 21
Worksheet time: 20mins
What is work?
A job
The ability to do work or supply heat
Something you don't want to do
What is energy?
Something you get from sleeping
The ability to do work or supply heat
A stadium in Houston
A magical power
What is thermochemistry?
study of heat changes that occur during a chemical reaction & physical changes of state
the study of heat and chemistry
the study of heat
the study of chemistry
When you add heat energy...
Temperatures increase
Molecules move slower
Molecules move faster
Temperatures decrease
Which one is NOT a form energy?
Kinetic
Sound
Nuclear
Plant
How does heat move?
From cold to hot
From hot to cold
What is chemical potential energy?
Energy from chemicals
Energy to make chemicals
Energy stored in chemical bonds
Energy from the sky
When a hot object and a cold object come together, heat will move from the warmer one to the colder one until they are the same temperature. What is this called?
Equal
Equilibrium
Equality
What is temperature?
a measure of cold
a measure of heat
a measure of how something feels
Endothermic
Energy is entering the system, something is getting warmer
Exothermic
Energy is exiting the system, something is getting colder
Equilibrium
Warmer and cooler temperatures balance out to be the same temperature
Match the following
Q
heat
M
mass
C
specific heat
ΔT
change in temperature
Calorimetry is...
A method of measuring temperature
A technique used to measure the amount of energy released or absorbed
accurate and precise measurement of heat change for chemical and physical processes
A method of measuring the amount of energy in a system
Which one is temperature change NOT dependent on
amount of heat added
Humidity levels
mass of the substances
composition of the substance (specific heat)
Specific heat of water is...
4180 J/g*C
41.80 J/g*C
4.184 J/g*C
0.4184 J/g*C
g ∘CJ or g ∘Ccal
c
g or kg
m
ΔT
C or K
c
J or cal, kJ or Kcal
0.72 kcal into joules
6.0 x 104 J
3.0 x 103 J
4.5 x 102 J
2.4 x 104 J
0.45 kcal into cal
450 cal
4500 cal
45 cal
0.045 cal
3,478 kJ into cal
832,000 J
8,321 kcal
3,478,000 J
832, 100 cal
How much heat, in calories, is needed to raise the temperature of 125.0 g of lead (c lead= 0.130 J/g°C) from 17.5°C to 41.1°C?
91.7 cal
9.17 cal
917 cal
917.0 cal
What mass of iron (ciron= 0.11 cal/g°C) would need 1450 cal of energy in order to raise its temperature by 19.7°C?
745 g
645 g
699 g
899 g
What is the specific heat of an unknown metal if 1.67 kcal of energy are required to raise the temperature of 79.2 g sample of the metal by 63.3°C?
0.5 cal/g*C
0.667 cal/g*K
0.167 cal/g*K
0.333 cal/g*C
