I wasn't hot enough quiz

The transfer of thermal energy between objects of different temperatures is called...

• temperature
• heat
• internal energy
• none of these

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NGSS.HS-PS3-4

Heat transfer by conduction occurs when...

• particles bump into each other
• large numbers of atoms move from place to place
• atoms give off heat in the form of electromagnetic waves
• electromagnetic waves travel from place to place through a vacuum

Tags

NGSS.HS-PS3-4

A substance with a high specific heat:

• Is always extremely hot.
• Requires a lot of energy to become hot.
• Is not heavy.
• Does not requires a lot of energy to become hot.

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NGSS.HS-PS3-1

NGSS.HS-PS3-4

The amount of thermal energy required to raise the temperature of one (1) kilogram of a substance by 1^o C is known as:

• Specific heat
• Heat of fusion
• Heat of vaporization
• Melting point

The equation that relates enthalpy, temperature and entropy is

• Hess's Law
• Second Law of Thermodynamics
• Gibbs Free Energy
• Calorimetry

 For which of these processes is the value of ΔH expected to be positive?
1.  The temperature increases when calcium chloride dissolves in water.
2.  Steam condenses to liquid water
3.  Water boils
4.  Dry ice sublimates

• 4 only
• 1 only
• 3 and 4 only
• 2 and 3 only

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NGSS.HS-PS3-1

NGSS.HS-PS3-4

Spontaneous reactions are driven by

• increasing enthalpy and increasing entropy.
• decreasing enthalpy and decreasing entropy.
• increasing enthalpy and decreasing entropy.
• decreasing enthalpy and increasing entropy.

Tags

NGSS.HS-PS1-4

Solid magnesium dissolves in a hydrochloric acid, releasing hydrogen gas and heat from a solution of magnesium chloride. What is the sign on ΔH for this reaction?

• Negative because it is exothermic
• Negative because it is endothermic
• Positive because it is exothermic
• Positive because it is endothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Which one of these would result in a decrease in entropy?

• A solid solute dissolves in water.
• A gas is released.
• A liquid freezes.
• A liquid boils.

A reaction has a positive ΔH and a positive ΔS. Which of the following is true?

• It will be spontaneous at all temperatures.
• It will be nonspontaneous at all temperatures.
• It will be spontaneous at low temperatures.
• It will be spontaneous at high temperatures.