Calorimetry and Latent Heat
Heat exchanged is Q = m s DT for temperature change and Q = mL for a phase change at constant temperature.
What is Calorimetry and Latent Heat?
Heat exchanged is Q = m s DT for temperature change and Q = mL for a phase change at constant temperature.
Key formula / rule: Q = m s DT; Q = mL during phase change.
Key points
- Apply the principle of calorimetry to mixture problems.
- Explain constant temperature during a phase change.
Common exam trap
Applying Q = m s DT across a phase change.
Definitions
- Term
Calorimetry and Latent Heat
- Meaning
Heat exchanged is Q = m s DT for temperature change and Q = mL for a phase change at constant temperature.
- Term
Calorimetry and Latent Heat — explanation
- Meaning
In an isolated system heat lost equals heat gained. Temperature stays constant during a phase change because the energy goes into breaking intermolecular bonds.
Learning objectives
Apply the principle of calorimetry to mixture problems.
Explain constant temperature during a phase change.
Formulae
- Key point
Q = m s DT; Q = mL during phase change.
- Key point
Temperature is constant during melting or boiling.
- Key point
Principle of calorimetry: heat lost = heat gained.
Prerequisites
PHY-U3-THR-T1-S1-C1
Common mistakes
Applying Q = m s DT across a phase change.
Neglecting the water equivalent of the calorimeter.
Keywords
Calorimetry
Latent
Practice preview
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