Standard 5 Exam Review

 $\Delta T$   means

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

Is this process ENDOthermic or EXOthermic?

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

What is happening to the water molecules when this happens?

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

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

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?

Consider water freezing to ice.

What is the equation for this process?

Consider water freezing to ice.

Is this an ENDOthermic or EXOthermic process?

Consider water freezing to ice.

What is happening to the water molecules when this happens?

Consider water freezing to ice.

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

Consider freezing to ice.

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

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

Consider methane gas burning and releasing heat.

CH₄ + O₂ --> H₂O + CO₂

Is this reaction ENDOthermic or EXOthermic?

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

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