Standard 5 Exam Review

Standard 5 Exam Review

Multiple Choice

 $\Delta T$   means

•  $T_{initial}\ -\ T_{final}$  

•  $T_{final}\ -\ T_{initial}$  

Multiple Choice

Consider water cooling from 75 ^oC to 0 ^oC.

Is this process ENDOthermic or EXOthermic?

• ENDOthermic

• EXOthermic

Multiple Choice

Consider water cooling from 75 ^oC to 0 ^oC.

What is happening to the water molecules when this happens?

• The molecules are slowing down

  (decreasing kinetic energy)

• The molecules are speeding up

  (increasing kinetic energy)

• The intermolecular attractions are forming

  (decreasing potential energy)

• The intermolecular attractions are breaking

  (increasing potential energy)

Multiple Choice

Consider water cooling from 75 ^oC to 0 ^oC.

Which part of the heating curve is this process on? (Click to see the picture)

• AB

• BC

• CD

• DE

• EF

Multiple Choice

Consider water cooling from 75 ^oC to 0 ^oC.

Which equation would you use to calculate the amount of heat given off to the surroundings?

• $q=m\Delta H_{fus}$

• $q=m\Delta H_{vap}$
  

• $q=mc\Delta T$

Multiple Choice

Consider water freezing to ice.

What is the equation for this process?

• H₂O (g) --> H₂O (l)

• H₂O (l) --> H₂O (s)

• H₂O (s) --> H₂O (l)

Multiple Choice

Consider water freezing to ice.

Is this an ENDOthermic or EXOthermic process?

• ENDOthermic

• EXOthermic

Multiple Choice

Consider water freezing to ice.

What is happening to the water molecules when this happens?

• The molecules are slowing down

  (decreasing kinetic energy)

• The molecules are speeding up

  (increasing kinetic energy)

• The intermolecular attractions are forming

  (decreasing potential energy)

• The intermolecular attractions are breaking

  (increasing potential energy)

Phet States of Matter (change to H2O molecules)

https://phet.colorado.edu/sims/html/states-of-matter/latest/states-of-matter_en.html

Multiple Choice

Consider water freezing to ice.

Which part of the heating curve is this process on? (Click to see the picture)

• AB

• BC

• CD

• DE

• EF

Multiple Choice

Consider freezing to ice.

Which equation would you use to calculate the amount of heat given off to the surroundings?

• $q=m\Delta H_{fus}$

• $q=m\Delta H_{vap}$
  

• $q=mc\Delta T$

Multiple Choice

You add ice to your glass of Coke. The Coke cools down because the coldness from the ice flowed into the liquid Coke.

• True

• False

Multiple Choice

Consider methane gas burning and releasing heat.

CH₄ + O₂ --> H₂O + CO₂

Is this reaction ENDOthermic or EXOthermic?

• ENDOthermic

• EXOthermic

Multiple Choice

Which of the following will decrease the number of collisions with the sides of the container and decrease pressure?

• Increasing the volume

• Adding gas molecules to the container

• Adding heat and increasing the temperature.

Phet Simulation - Gas Properties

https://phet.colorado.edu/en/simulation/gas-properties

Multiple Choice

As you increase temperature, you increase pressure. Therefore, temperature and pressure are DIRECTLY PROPORTIONAL. Which graph shows this?