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WorksheetsThermochemistry Introduction
Total questions: 10
Worksheet time: 2hrs 40mins
The release of chemical potential energy produces all of the following except:
heat
work
motion
cooling
Chemicals in gasoline contain a large amount of potential energy because:
there are many compounds present in gasoline
gasoline components carry out several reactions
gasoline is very volatile
there are many chemical bonds present
A unit of heat is the ________
joule/sec
joule/kg
joule
joule · gram/sec
In an exothermic process, the surrounding loses heat.
True
False
Do the reactants in an exothermic reaction have higher or lower energy than the products?
Higher
Lower
A slower particle has lower energy than an identical, faster particle.
True
False
Thermal energy always moves:
From a high temperature object to a lower temperature object.
From a lower temperature object to a higher temperature object.
From an object with lower kinetic energy to an object with higher kinetic energy.
From an object of higher mass to an object of lower mass.
Using your knowledge of stoichiometry, refer to the following question:
2N2 + 3H2 --> 2NH3 + 46 kJ
How much energy would be produced if only 1 mol of nitrogen was reacted?
92 kJ
0.143kJ
23kJ
15kJ
The diagram shows what happens when zinc reacts with hydrochloric acid. Which of these best describes the energy transformation that occurs during this reaction?
Thermal energy - kinetic energy
Kinetic energy -potential energy
Chemical energy - thermal energy
Potential energy - chemical energy
What is the relationship between the total amount of energy at location A & E (without friction)?
A has more total energy than E
E has more total energy than A
You cannot tell how much total energy they have
A and E have the same amount of total energy
