Climate Change & Pancake Chemistry
Mole-to-Mole and Mass-to-Mass Conversions
Limiting Reactant and Yield Calculations
Enthalpy and Heat of Reaction
Ch. 8 Trivia
100

What is the chemical formula for carbon dioxide?

CO2

100

What is a mole in chemistry?

A unit of measurement representing Avogadro's number of atoms, molecules, or ions.

100

What is the limiting reactant?

The reactant that determines the maximum amount of product that can be formed in a chemical reaction.

100

What does enthalpy measure in a chemical reaction?

Enthalpy measures the heat energy of a reaction.

100

What gas is primarily responsible for the greenhouse effect?

Carbon dioxide (CO2).

200

 How does carbon dioxide contribute to the greenhouse effect?

 It absorbs and emits infrared radiation, trapping heat in the Earth's atmosphere.

200

How do you calculate the number of moles of a substance given its mass and molar mass?

Divide the mass of the substance by its molar mass.

200

How do you find the theoretical yield?

By using stoichiometry to calculate the maximum amount of product that can be obtained from the limiting reactant.

200

What is an exothermic reaction?

An exothermic reaction releases heat, making its surroundings warmer.

200

 In a balanced chemical equation, what do the coefficients represent?

The relative number of moles of each reactant and product involved in the reaction.

300

 In a chemical reaction, what role does the limiting reactant play?

 It determines the maximum amount of product that can be formed.


300

How is the mole concept applied in stoichiometry?

It allows chemists to calculate the quantities of reactants and products in chemical reactions based on balanced equations and mole ratios.

300

What is percent yield?

It's a measure of the efficiency of a reaction, calculated by dividing the actual yield by the theoretical yield and multiplying by 100.

300

What does an endothermic reaction do?

An endothermic reaction absorbs heat, making its surroundings cooler.

300

Why do chemists use the idea of a "mole"?

It's a counting unit to help measure tiny things like atoms and molecules.

400

What role does stoichiometry play in chemistry?

It involves the calculation of reactants and products in chemical reactions based on balanced equations and mole ratios.

400

What is a mole ratio in chemistry?

It represents the ratio of moles of one substance to moles of another in a balanced chemical equation, used in stoichiometric calculations.

400

Why is the concept of limiting reactants important in yield calculations?

Because the limiting reactant determines the maximum amount of product that can be obtained, which affects the percent yield.

400

How is enthalpy change represented in a chemical equation?

Enthalpy change (∆H) shows the heat absorbed or released during a reaction.

400

Why is it useful to know about heat changes in reactions?

It helps us understand how reactions work and whether they make things hotter or colder.

500

Explain the function of a catalyst in a chemical reaction.

A catalyst speeds up the rate of a chemical reaction by providing an alternate pathway with a lower activation energy, without being consumed in the reaction.

500

How do you find out which reactant is used up first in a chemical reaction?

By comparing the mole ratios of reactants in the balanced equation to the amounts actually present.

500

What factors can affect the percent yield?

Impurities, incomplete reactions, and experimental errors can all affect the percent yield.

500

Why is understanding enthalpy important in chemistry

 It helps us predict whether a reaction releases or absorbs heat and understand reaction feasibility.


500

Why is it important to balance chemical equations?

It makes sure that the same number of each type of atom is on both sides of the equation, showing that mass is conserved in the reaction.