Semester 2nd Review

Front

What is a Balanced Chemical Equation (BCE)?

Back

A Balanced Chemical Equation shows the equal number of atoms for each element in the reactants and products, ensuring the law of conservation of mass is followed.

Front

What is the right ratio of chemicals for the BCE: CO + Fe2O3 --> Fe + CO2?

Back

The correct ratio is 3,1 --> 2,3.

Front

How can you reduce the pressure in a closed container?

Back

By decreasing the number of particles in the container.

Front

What is the effect of increasing concentration on the speed of a reaction?

Back

Increasing concentration increases the speed of reaction by increasing collisions between reactant particles.

Front

In the reaction N2(g) + 3 H2(g) <=> 2 NH3(g), what happens to concentrations if pressure is increased?

Back

The concentration of NH3 will increase as it has fewer moles of gas.

Front

What is the role of activation energy in chemical reactions?

Back

Activation energy is the minimum energy required for a reaction to occur.

Front

What is the relationship between temperature and reaction rate?

Back

Increasing temperature generally increases the reaction rate by providing more energy to the reactants.

Front

What is the significance of stoichiometry in chemical reactions?

Back

Stoichiometry allows us to calculate the amounts of reactants and products involved in a chemical reaction.

Front

How do catalysts affect chemical reactions?

Back

Catalysts speed up chemical reactions by lowering the activation energy without being consumed in the process.

Front

What is the difference between exothermic and endothermic reactions?

Back

Exothermic reactions release heat, while endothermic reactions absorb heat.