Thermal Energy by Rhodora Chio

In this Equation "c" stands for

• energy change of the substance

• change in the mass of the substance

• change in temperature

• energy to change 1g of a sample 1 degree C

In an endthermic reaction …….

• more heat energy is released than absorbed

• more heat energy is taken in than released

• nothing happens

• energy transfer stops when temperature increases

Tags

NGSS.HS-PS1-4

There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 43 degrees celsius. Which cup has the least thermal energy?

• Large cup (Trenta)

• Small cup (Tall)

• Venti

• All three are the same temperature so they have same thermal energy

Tags

NGSS.HS-PS3-4

You perform a calorimetry experiment for a cheeto. You collect the following data:

21.5 g of water in the coke can

Inital T of the water is 8.1 ⁰C

Final T of water is 24.0 ⁰C

How many calories are in the cheeto? uhmmm SF

• 340.0 cal

• 174.15 cal

• 170 cal

• 340 cal

Tags

NGSS.HS-PS3-4

What information does the specific heat capacity of water tell us?

• How much energy was released in the combustion of our food item

• The amount of energy to raise the temperature of 1 gram of water 1 Celsius degree

• The amount of energy in our water when we started the calorimetry lab

• It is just a constant to help us cancel units

In the lab, your goal was to measure the amount of Calories per gram in a potato chip. First, 56.0g of water at 25^oC was added to the coke can. Then a 3.9g potato chip was set on fire under the can. After the chip has stopped burning, the mass of the burned remnants was 1.5g and the temp of the water has risen to 85^oC. How many Cal/g are in the chip?

• 861 Cal/g

• 2.24 Cal/g

• 1.4 Cal/g

• 7 Cal/g

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4