What is enthalpy primarily associated with in chemical reactions?

Enthalpy and Energy Changes in Reactions

Interactive Video
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Chemistry
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9th - 10th Grade
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Hard

Patricia Brown
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Volume changes
Pressure variations
Energy changes in chemical bonds
Temperature changes
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When two NO2 molecules combine to form N2O4, what happens to the energy?
Energy is absorbed
Energy is converted to mass
Energy remains constant
Energy is released
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following processes releases energy?
Breaking of Cl2 bonds
Formation of Al-water complex
Ionization of Xe
Conversion of ice to steam
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to energy when a fluorine atom gains an electron?
Energy remains unchanged
Energy is absorbed
Energy is released
Energy is converted to light
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is required to break a Cl2 molecule into two chlorine atoms?
No energy change
Release of energy
Conversion to heat
Absorption of energy
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the combustion of methane, what is the enthalpy change when one mole of methane is burned?
88 kJ of energy is absorbed
88 kJ of energy is released
2642 kJ of energy is absorbed
3450 kJ of energy is released
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a negative Delta H indicate about a reaction?
The reaction is endothermic
The reaction is exothermic
The reaction is isothermal
The reaction is adiabatic
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