Question

Silver nitrate reacts with calcium to make calcium nitrate and silver. The reaction is exothermic and produces 18.7 kJ/mol of energy. How much energy will be produced when 14.8 g of silver nitrate react. Show your work

Answer 1

1.63 kilo Joules of energy will be produced when 14.8 g of silver nitrate react.

Step-by-step explanation:

`AgNO_3+Ca\rightarrow Ag+CaNO_3,\Delta H_(rxn)=-18.7 kJ/mol`

Mass of silver nitrate = 14.8 g

Moles of silver nitrate =
`(14.8 g)/(170 g/mol)=0.08706 mol`

According to reaction, when 1 mole of silver nitrate reacts with 1 mole of calcium it gives 18.7 kJ of heat.

Then amount of heat released when 0.08706 moles of silver nitrate reacts :

`0.08706* 18.7 kJ=1.628 kJ\approx 1.63 kJ`

1.63 kilo Joules of energy will be produced when 14.8 g of silver nitrate react.