Enthalpy

Flashcard
•
Chemistry
•
10th Grade
•
Easy
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1.
FLASHCARD QUESTION
Front
What is Enthalpy?
Back
Enthalpy (H) is a measure of the total energy of a thermodynamic system, including internal energy and the energy required to make room for it by displacing its environment.
2.
FLASHCARD QUESTION
Front
What does ΔH represent in a chemical reaction?
Back
ΔH represents the change in enthalpy during a chemical reaction, indicating whether the reaction absorbs or releases heat.
3.
FLASHCARD QUESTION
Front
What is the sign of ΔH for an exothermic reaction?
Back
The sign of ΔH for an exothermic reaction is negative, indicating that heat is released.
4.
FLASHCARD QUESTION
Front
What is the sign of ΔH for an endothermic reaction?
Back
The sign of ΔH for an endothermic reaction is positive, indicating that heat is absorbed.
5.
FLASHCARD QUESTION
Front
What is specific heat?
Back
Specific heat is the amount of energy required to raise the temperature of 1 gram of a substance by 1°C.
6.
FLASHCARD QUESTION
Front
In the reaction C + O2 → CO2 + 60kJ, what is ΔH?
Back
ΔH = -60 kJ, indicating the reaction is exothermic.
7.
FLASHCARD QUESTION
Front
For the reaction 2NO + O2 → 2NO2, if ΔH = -112 kJ, what does this imply?
Back
This implies that the reaction releases 112 kJ of energy, making it exothermic.
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