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Science Clinic => Chemistry => Topic started by: RODY.ELKHALIL on Nov 18, 2019

Title: Why does the temperature of a substance stay constant during a phase change such as vaporization?
Post by: RODY.ELKHALIL on Nov 18, 2019

Question 1

Define viscosity.

Question 2

Why does the temperature of a substance stay constant during a phase change such as vaporization?

Title: Why does the temperature of a substance stay constant during a phase change such as vaporization?
Post by: amy.lauersdorf90 on Nov 18, 2019

Answer 1

Viscosity is the resistance of a liquid to flow.

Answer 2

The energy added to the substance is not used to raise the kinetic energy of the substance. Instead it is "used up" in breaking the intermolecular attractions between particles to take them from a liquid (with intermolecular attractions) to a gas (with no intermolecular attractions).