A Substance Has a Melting Point of 20°C and a Heat

question 52

Multiple Choice

A substance has a melting point of 20°C and a heat of fusion of 3.4 ×
J/kg.The boiling point is
And the heat of vaporization is
At a pressure of one atmosphere.The specific heats for the solid,liquid,and gaseous phases are 600 J/kg ∙ K (solid) ,1000 J/kg ∙ K (liquid) ,and 400 J/kg ∙ K (gaseous) .How much heat is required to raise the temperature of
Of this substance from
To
At a pressure of one atmosphere?

• A)260 kJ
• B)190 kJ
• C)230 kJ
• D)92 kJ
• E)320 kJ

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Definitions:

Short-run Phillips Curve

A visual diagram illustrating the short-term inverse correlation between inflation rates and unemployment rates.

Policymakers

Individuals or groups responsible for making and implementing policies, especially in government and legislative contexts.

Natural-rate Hypothesis

The theory suggesting that there is a specific level of unemployment that exists in an economy that is not eliminated by monetary policy in the long run.

Favorable Supply Shock

An unexpected event that suddenly increases the supply of a product or service, resulting in decreased prices and increased quantity.