Question 1

Renewable energy sources are essentially exhaustible.

Accepted Answer

Renewable energy sources are typically considered to be inexhaustible, as they rely on natural processes that can be replenished over time, such as sunlight, wind, and water. While there may be limits to the amount of energy that can be harvested from these sources in a given area or time period, they are not inherently finite in the way that fossil fuels are.

Question 2

The ΔH_vapof water is 40.7 kJ at 100 °C.How much liquid water in grams can be converted to vapor if 5950 J of heat are absorbed?

Accepted Answer

The answer of The ΔH_vapof water is 40.7 kJ...

Question 3

The primary component of natural gas is methane.

Accepted Answer

Methane makes up about 70-90% of natural gas.

Question 4

________ is defined as the energy used to move an object against a force.

Accepted Answer

The answer of ________ is defined as the energy used...

Question 5

One joule equals 1 kg-m²/s².

Accepted Answer

One joule is defined as the amount of energy transferred when one newton of force is applied over a distance of one meter, which simplifies to 1 kg·m²/s² in SI units.

Question 6

Work equals mass times distance.

Accepted Answer

The correct formula is work equals force times distance (W = Fd).

Question 7

The ΔH_vapof water is 40.7 kJ at 100 °C.How much heat energy is required to convert 15.0 grams of liquid water to vapor.

Accepted Answer

The answer of The ΔH_vapof water is 40.7 kJ...

Question 8

An 8 oz.bottle of energy drink contains 6.0 g of protein,2.0 g of fat,and 16.3 g of carbohydrate.The fuel value of this energy drink bottle is ________ kJ.The fuel values for protein,fat,and carbohydrate are 17,38,and 17 kJ/g,respectively.

Accepted Answer

First, we need to calculate the energy in kJ for each macronutrient in the energy drink:

Energy from protein = 6.0 g x 17 kJ/g = 102 kJ
Energy from fat = 2.0 g x 38 kJ/g = 76 kJ
Energy from carbohydrate = 16.3 g x 17 kJ/g = 277.1 kJ

Then, we add up the energy from each macronutrient to get the total fuel value:

Total fuel value = 102 kJ + 76 kJ + 277.1 kJ = 455.1 kJ

Finally, we round the answer to the nearest whole number, since the question only asks for the fuel value in kJ, not in decimal places:

Fuel value = 460 kJ

Therefore, the best answer is D.

Question 9

Petroleum is a liquid that can be refined to produce fuels such as gasoline,diesel oil,and kerosene.

Accepted Answer

This statement is true. Petroleum is a fossil fuel that can be refined to produce various types of fuels, including gasoline, diesel oil, and kerosene.

Question 10

The ________ of a reaction is the enthalpy change when all reactants and products are at 1 atm pressure and a specific temperature.

Accepted Answer

The answer of The ________ of a reaction is the...

Question 11

Energy units include watts,volts,and newtons.

Accepted Answer

Watts, volts, and newtons are not energy units, but rather units of power, electrical potential, and force, respectively. Energy units include joules, calories, and electron volts.

Question 12

The ΔH_rxnfor the combustion of methane is -890.0 kJ.How much heat energy (kJ)is released if 82.1 grams of methane are burned in an excess amount of oxygen?

Accepted Answer

The answer of The ΔH_rxnfor the combustion of methane...

Question 13

When 0.800 grams of NaOH is dissolved in 100.0 grams of water,the temperature of the solution increases from 25.00 °C to 27.06 °C.The amount of heat absorbed by the water is ________ J.(The specific heat of water is 4.18 J/g-°C.)

Accepted Answer

The answer of When 0.800 grams of NaOH is dissolved...

Question 14

Coal contains hydrocarbons of high molecular weight as well as compounds containing ________,sulfur,or nitrogen.

Accepted Answer

The answer of Coal contains hydrocarbons of high molecular weight...

Quiz 5: Thermochemistry