When a Substance Changes Phase,from Solid to Liquid or Liquid

question 26

Multiple Choice

When a substance changes phase,from solid to liquid or liquid to vapor and vice versa,there is no change in temperature,even though heat is being added or removed.Why is there no change in temperature?

• A)During a phase change,energy is used to break/establish the intermolecular bonds rather than stored as kinetic energy of the molecules.
• B)During a phase change,temperature is not well defined since there are two phases involved.
• C)During a phase change,energy is needed to overcome the gravitational pull.
• D)During a phase change,the temperature measured is the last temperature of the measuring device.
• E)none of the above

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Definitions:

Razor-And-Razor-Blade

A business model where a company sells a durable product at a low price (razor) and then sells consumable products that are needed to use the initial product (razor blades) at a higher margin.

Printer-And-Ink

A common business model in the printing industry where printers are sold at a low cost and the recurring revenue is generated through the sales of ink cartridges.

Ubiquitous

Present, appearing, or found everywhere; often used to describe technology or phenomena that are widespread and common in daily life.

Razor-And-Razor-Blade Revenue Model

A business strategy where a company sells a durable product at a low price to increase the sale of disposable complementary products.