Hydrogen fusion.
The hydrogen atoms in the core of the sun are under such intense pressure that they combine to form helium and energy.
The energy is dependent on the reactants.
Enzymes speed up a reaction by lowering the activation energy. This is the amount of energy required to start the reaction. By lowering the activation energy, the reaction can proceed much more quickly.
The overall enthalpy change in a common reaction would not change. Only the path to get there would change. A catalyst basically lessens the activation energy required to get the reaction to take place.
It requires almost as much energy to create nuclear fusion as the energy it creates. :)
The energy of the reactants in a chemical reaction is known as the activation energy. It represents the minimum amount of energy required to initiate a reaction by breaking the chemical bonds in the reactant molecules. The reactants typically have higher energy levels than the products in an exothermic reaction.
That depends on the signals given to the cell. If a cell receives a positive feedback, it makes more. If there are too much, a negative feedback is given to lower the amount. This is a way of controlling the enzyme balance in your body.
The reaction of hydrogen and oxygen to form water is exothermic, meaning it releases energy in the form of heat. This can be determined by observing that the overall energy level of the products (water) is lower than the energy level of the reactants (hydrogen and oxygen).
The energy of activation graph shows how much energy is needed for a reaction to occur. It reveals information about the steps involved in the reaction mechanism, such as the presence of intermediate steps or the overall complexity of the process.
The amount of energy needed for a reaction to take place is called the activation energy. It is the minimum amount of energy required for the reactants to transform into products. This energy is needed to break bonds in the reactant molecules before new bonds can be formed.
The activation energy graph shows how much energy is needed for a reaction to occur. A higher activation energy indicates a more complex reaction mechanism with multiple steps, while a lower activation energy suggests a simpler mechanism with fewer steps.
The amount of energy released from a fission reaction is much greater than that from a chemical reaction because fission involves the splitting of atomic nuclei, leading to a significant release of nuclear binding energy. This energy release is millions of times greater than the energy released in chemical reactions, which involve breaking and forming chemical bonds.
How could a chemist find out how much mass is given off as gas during a chemical reaction