SES 141 ENERGY IN EVERYDAY LIFE MODULE 2

Estimate how many times your heart beats in one year.

31,536,000

Estimate the number of apples that is the energy equivalent of 1 gallon of gasoline.

120

Estimate the time it takes (in hours) to cook a chicken at about 350 °F.

0.5

Estimate the energy of one apple (in Joule).

1,000,000

Estimate of the energy (in joule) contained in a quart of soda.

1,422,560

Estimate the energy in one gallon of gasoline (in joule).

120,000,000

Estimate how much the electric company charges (in cents) for 1 kilowatt-hour.

13

Estimate how many times your heart will beat in your lifetime. Enjoy every one of them.

2,585,952,000

Estimate the cost (in cents) to cook a chicken.

20

Estimate the power usage (in watt) of a typical electric oven.

3,000

What is the energy density (energy per mass) of butter and similar foods?

45 MJ/kg

What is the energy density (energy per mass) of gasoline?

45 MJ/kg

Estimate how many minutes are in a year.

535,600

Estimate the average number of times your heart beast in 1 minute (e.g., your resting heart rate).

60

Estimate an average human lifetime (in years).

82

What are the roles of a catalyst in the energetics of a chemical reaction?

A catalyst is not consumed by the reaction. A catalyst increases the rate of reaction.

Match the quantity on the left with the beset answer on the right.

Chemical Element: Different number of protons, Isotope: Different number of neutrons , Molecule: Two or more atoms, Ionization: Electron freed from an atom.

Match the quantity with their unit.

Energy: Joule, Speed: Meter per second, Acceleration: Meter per second per second, Power: Watt.

You are given 12 grams of an unknown substance. How you would accurately determine the precise composition of the unknown substance?

Excite a small portion of it and identify the spectral lines.

Glow sticks are an example of what type of chemical reaction?

Exothermic

What happens energetically when chemical bonds are formed?

Forming bonds releases energy.

Which of the following elements are in the noble gas column of the periodic table of the elements?

Helium Krypton

The activation energy of a chemical reaction is the:

energy input needed to get the atoms to start sharing their electrons.

Combining hydrogen and oxygen to make water

releases a lot of energy.