chemical energy
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Why is it important for chemists to predict whether reactions in an industrial process are exothermic or endothermic
If reactions are exothermic heat will need to be removed / If reactions are endothermic heat will need to be supplied
explain the difference between bond enthalpy and mean bond enthalpy
Mean bond enthalpy is an average energy from a number of compounds. Bond enthalpy relates to only one particular compound
what is the formula for calculating density
mass/volume
What is enthalpy
a measure of the chemical energy of a substance
What is the enthalpy of combustion
enthalpy change when one mole of the substance burns completely in oxygen
What is the molar bond enthalpy
the energy required to break one mole of bonds in a diatomic molecule
Hydrogen atoms do not show up clearly on an electron density map suggest a reason for this
they only have 1 electron