physical science ppt

1. PHYSICAL SCIENCE
Group 8
Hilvano, Sofia
Prestoza, Jerico
Lago, Clark

2. Importance of
Activation
Energy
All chemical reactions, including exothermic
reactions, need activation energy to get
started. Activation energy is needed so
reactants can move together, overcome forces
of repulsion, and start breaking bonds. All
chemical reactions, including exothermic
reactions, need activation energy to get
started.
Activation energy is needed so reactants can
move together, overcome forces of repulsion,
and start breaking bonds.
In short: Activation energy is needed to start
chemical reactions.

3. Enzyme
Enzymes are proteins that act as biological catalysts by
accelerating chemical reactions. The molecules upon
which enzymes may act are called substrates, and the
enzyme converts the substrates into different molecules
known as products.
Enzymes are proteins that act as biological catalysts by
accelerating chemical reactions.
The molecules upon which enzymes may act are called
substrates, and the enzyme converts the substrates into
different molecules known as products.
In short: Enzymes convert substrates into products to
accelerate chemical reactions.

4. Transition State of
Catalyst
The catalyst lowers the energy of the transition
state for the reaction. Since the activation energy
is the difference between the transition state
energy and the reactant energy, lowering the
transition state energy also lowers the activation
energy.
The catalyst lowers the energy of the transition
state for the reaction.
Since the activation energy is the difference
between the transition state energy and the
reactant energy, lowering the transition state
energy also lowers the activation energy.
In short: Lowering transition state energy lowers
activation energy

5. Catalysis
Catalysis is a term describing a process in which the rate
and/or the outcome of the reaction is influenced by the
presence of a substance (the catalyst) that is not
consumed during the reaction and that is subsequently
removed if it is not to constitute as an impurity in the final
product.
other explanation: The process of catalysis involves
introducing a catalyst to a chemical reaction to speed up
the process. As a result of the reaction, catalysts are not
consumed and continue to function.

6. Maxwell Boltzman
distribution
The Maxwell-Boltzmann distribution is concerned
with how much energy is distributed among
identical but distinct particles. It displays the
likelihood of the distribution of states in a system
with various energies. The known as Maxwell
distribution law of molecular velocities is an
exception to this rule.
In short: Maxwell Boltzmann distribution is a
graphic representation of particle speed and
number.

7. Effect of a
catalyst on
rate of
reaction:
A appropriate catalyst can be added to a reaction to
accelerate its rate. A catalyst is a material that speeds up
a chemical reaction while being chemically unaltered at
the end of the process. It offers a different, lower-
activation-energy reaction pathway.
Other explanation: Catalyst are substances that increase
the rate of a chemical reaction by lowering its activation
energy. They can speed up reactions by thousands or
millions, making them essential in many industrial and
biological processes. They are not consumed in the
reaction, making them cost-effective and efficient

8. Thank You!