Transcript Phase Changes and the Heating Curve

Diva Dollar Question
• Why does a large pot of water take so long
to boil? (Hint: Look at the front of the
ESRT’s)
Aim: How are the phase changes of
water shown on a graph?
• Topic: Water Cycle & Climate
• Main Idea: Heating Curve of Water
1) Which heats up faster: a metal
fork or a wooden fork?
• A metal fork heats up faster because it
has a lower specific heat (amt of heat
needed to raise the temp.).
2) What is latent heat?
• This is heat energy absorbed or released
during a phase change.
3) What is a “phase change”?
• Melting= solid to liquid= energy absorbed
• Evaporation= liquid to gas= energy
absorbed
• Condensation= gas to liquid= energy
released
• Freezing= liquid to solid= energy released
What is a heating curve?
4) What do the flat lines on a
heating curve represent?
• These represent when energy is being
absorbed or released and water is
changing phase.
5) What do the slanted lines on a
heating curve represent?
• These represent when water is in a
phase (solid, liquid or gas).
Diva Dollar Question
• Why does the temperature go up just
before it rains but not before it snows?
•
Summary:
Answer the questions at
the bottom of the notes.