AP: Thermodynamics

This law states that the energy in the universe is constant.  Energy cannot be created nor destroyed but changed from one form to another.  Which law is this?

• Third Law of thermodynamics
• Second Law of thermodynamics
• First Law of thermodynamics

Tags

NGSS.MS-PS3-4

Which example below is an example of a decrease in entropy? 

• water freezing
• campfire burning
• water boiling
• a copper coin rusts

Which is the correct order of increasing entropy?

• Gas>Liquid>Solid
• Liquid>Gas>Solid
• Solid>Gas>Liquid
• Solid>Liquid>Gas

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.

Entropy increases from solid, liquid to gas. Why?

• Molecular disorder increases
• Molecular randomness decreases
• Molecules are more energetic
• Molecules are more reactive

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high

Tags

NGSS.HS-PS3-4

The specific heat capacity of silver is 0.24 J/^oCg.  Calculate the energy required to raise the temperature of 150 grams of silver from 273 K to 298 K.

• 10728 J
• 9828 J
• 900 J
• More info needed

High temperature is connected to:

• Low kinetic energy.
• High kinetic energy.
• Zero net energy.
• Equal kinetic energies.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If ΔH is positive, heat energy would be shown on the _____ side of the equation.

• reactant
• product

Tags

NGSS.HS-PS1-4

If the enthalpy (ΔH) is negative, the reaction is ____.

• Endothermic
• Exothermic
• Neutral

Tags

NGSS.HS-PS1-4