Che 125 Thermodynamics UPDATED Exam Questions and CORRECT Answers
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Course
Thermodynamics
Institution
Thermodynamics
Che 125 Thermodynamics UPDATED
Exam Questions and CORRECT Answers
thermodynamics - CORRECT ANSWER- physical processes (heat is transferred from hot
objects to cool objects)
Basic laws of thermodynamics - CORRECT ANSWER- 1. energy cannot be created or
destroyed, only transformed or transferr...
Che 125 Thermodynamics UPDATED
Exam Questions and CORRECT Answers
thermodynamics - CORRECT ANSWER- ✔✔physical processes (heat is transferred from hot
objects to cool objects)
Basic laws of thermodynamics - CORRECT ANSWER- ✔✔1. energy cannot be created or
destroyed, only transformed or transferred
How is kinetic energy affected in any given molecule by temperature - CORRECT
ANSWER- ✔✔kinetic energy increases as temperature increases
True or False:
We can only measure the change in energy (absorbed or released). - CORRECT ANSWER-
✔✔True
True or false?
We can measure the absolute value for energy stored. - CORRECT ANSWER- ✔✔False
Define a system - CORRECT ANSWER- ✔✔process under study
Define surroundings - CORRECT ANSWER- ✔✔the rest of the universe
Energy is lost from the system to. . . - CORRECT ANSWER- ✔✔the surroundings
Energy is gained by the system at the expense of . . . - CORRECT ANSWER- ✔✔the
surroundings
Define Heat flow - CORRECT ANSWER- ✔✔transfer thermal energy from hot object to
cold ones
what is happening in this chemical reaction?
, CH4 + O2 ---> CO2 + H20 - CORRECT ANSWER- ✔✔temp. of air surrounding the reaction
in increasing.
some potential energy is converted to kinetic energy
molecules surrounding the reaction speed up
1 st law of thermodynamics - CORRECT ANSWER- ✔✔energy cannot be created or
destroyed
Breaking of a bond has what effect on energy? - CORRECT ANSWER- ✔✔consumes energy
The formation of a new bond, has what effect on energy? - CORRECT ANSWER-
✔✔releases energy
In an exothermic reaction
Energy _____________ is greater than energy ______________ to break up . - CORRECT
ANSWER- ✔✔released
used
In an endothermic reaction
Energy __________ to break bonds is __________ then energy ___________during
formation of new bonds. - CORRECT ANSWER- ✔✔used
greater
released
where does the energy used during endothermic and exothermic reactions come from? -
CORRECT ANSWER- ✔✔collisions
Define the thermodynamic model - CORRECT ANSWER- ✔✔system + surroundings =
universe
Energy required to break the bonds is less than the energy released when bonds are formed,
there is a net release of energy.
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