The reaction absorbs heat energy
All reactions need heat energy
Energy is given off by the reaction
Heat energy is destroyed during reactions
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
Heat + CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
CH4(g)+2O2(g)+heat→CO2(g)+2H2O(g)
CH4(g)+2O2(g)→CO2(g)+2H2O(g)+heat
Energy is absorbed during the reaction, making the energy of the products greater than the energy of the reactants.
Energy is given off during the reaction, making the energy of the products greater than the energy of the reactants.
Energy is absorbed during the reaction, making the energy of the reactants greater than the energy of the products.
Energy is given off during the reaction, making the energy of the reactants greater than the energy of the products.
High kinetic energy
A chemical reaction
Hydrogen bonding
Temperature at freezing point
Condensation
Vaporization
Boiling
Melting
Conservation of energy.
Conservation of mass.
Definite composition.
Multiple proportions.
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