Q = m * L
Flashcard
•
Chemistry
•
6th - 8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does Q = m * L represent in thermodynamics?
Back
Q represents the heat energy absorbed or released, m is the mass of the substance, and L is the latent heat (energy per unit mass) associated with a phase change.
2.
FLASHCARD QUESTION
Front
What is latent heat?
Back
Latent heat is the amount of heat energy required to change the phase of a substance without changing its temperature.
3.
FLASHCARD QUESTION
Front
What is the latent heat of fusion?
Back
The latent heat of fusion is the heat energy required to change a substance from solid to liquid at its melting point.
4.
FLASHCARD QUESTION
Front
What is the latent heat of vaporization?
Back
The latent heat of vaporization is the heat energy required to change a substance from liquid to gas at its boiling point.
5.
FLASHCARD QUESTION
Front
How do you calculate the energy needed to melt a substance?
Back
Use the formula Q = m * L_f, where L_f is the latent heat of fusion.
6.
FLASHCARD QUESTION
Front
How do you calculate the energy needed to boil a substance?
Back
Use the formula Q = m * L_v, where L_v is the latent heat of vaporization.
7.
FLASHCARD QUESTION
Front
What is the significance of negative energy values in phase changes?
Back
Negative energy values indicate that energy is released during the phase change, such as when a substance freezes or condenses.
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