The material that absorbs the heat of the system is water owing to its high specific heat capacity.
The specific heat capacity of a substance refers to the amount of heat that is capable of increasing the temperature of 1 Kg of a body by 1 K. The higher the specific heat capacity, the more the amount of heat that the body can absorb without temperature change.
The material that absorbs the heat of the system is water because water has a higher specific heat capacity than all the other materials present.
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The unbalanced equation is BF3 + Li2 SO3 --> B2 (SO3)3 + LiF, where the numbers to the right of the symbols are subscripts. The balanced equation is 2 BF3 + 3 Li2SO3 ---> B2 (SO3)3 + 6LiF. The numbers in front of every formula (compound) are the respective coefficients. You can check that the equation is balanced counting every element: There are 2B in the side of the reactants and 2B in the side of the products; there are 6F in the side of the reactants and 6F in the side of the products; there are 6 Li in the side of the reactants and 6 Li in the side of the products; and there are 3 SO3 in the side of the reactants and 3 SO3 in the side of the products. <span>So, the coefficient of the LiF is 6.</span>
Due to the Octet Rule ...
Elements on the right side of the Periodic Table gain electrons in order to get the 8 valence electrons and form negative ions.
And elements on the left side of the Periodic Table lose electrons in order and form positive ions.
