Calculating Heat of Reaction in Thermochemistry Problems

[trichardt_200]

I am a high school senior having a problem with a problem in my thermochem class. Could someone please help me understand the following:

if 16.8 kJ are released when 1.20 g of F sub 2 (F2) reacts with SiHsub4 (SiH4), what is the heat of reaction when 1.90 moles of Fsub2 react?

 

[Borek]

Nothing hard here - convert 1.2g to moles and calculate heat evolving per mole, then use this value to calculate amount of heat released when 1.90 moles react.