Climate Change & Pancake Chemistry
What is the chemical formula for carbon dioxide?
CO2
What is a mole in chemistry?
A unit of measurement representing Avogadro's number of atoms, molecules, or ions.
What is the limiting reactant?
The reactant that determines the maximum amount of product that can be formed in a chemical reaction.
What does enthalpy measure in a chemical reaction?
Enthalpy measures the heat energy of a reaction.
What gas is primarily responsible for the greenhouse effect?
Carbon dioxide (CO2).
How does carbon dioxide contribute to the greenhouse effect?
It absorbs and emits infrared radiation, trapping heat in the Earth's atmosphere.
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.
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.
What is an exothermic reaction?
An exothermic reaction releases heat, making its surroundings warmer.
In a balanced chemical equation, what do the coefficients represent?
The relative number of moles of each reactant and product involved in the reaction.
In a chemical reaction, what role does the limiting reactant play?
It determines the maximum amount of product that can be formed.
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.
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.
What does an endothermic reaction do?
An endothermic reaction absorbs heat, making its surroundings cooler.
Why do chemists use the idea of a "mole"?
It's a counting unit to help measure tiny things like atoms and molecules.
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.
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.
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.
How is enthalpy change represented in a chemical equation?
Enthalpy change (∆H) shows the heat absorbed or released during a reaction.
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.
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.
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.
What factors can affect the percent yield?
Impurities, incomplete reactions, and experimental errors can all affect the percent yield.
Why is understanding enthalpy important in chemistry
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.