Chemistry question?
Given the following data
2ClF(g) + O2(g) Cl2O(g) + F2O(g) ΔH = 167.4 kJ
2ClF3(g) + 2O2(g) Cl2O(g) + 3F2O(g) ΔH = 341.4 kJ
2F2(g) + O2(g) 2F2O(g) ΔH = -43.4 kJ
calculate ΔH for the reaction
ClF(g) + F2(g) ClF3(g) ΔH =_____kJ
Hint: Be sure that the coefficients in the sum of the equations are the same as those in the target reaction. Remember to reverse the sign of the enthalpy value when you reverse the reaction equation.
Answer:
Find some linear combination of the first three equations which produces the last one. If necessary, assign coefficients a, b, and c to the equations, set any one coefficient to 1, develop equations for the coefficients to conserve the number of atoms, and solve as a linear system. Once that is done, the coefficients can be used to work out the enthalpy change.
I'm not doing your homework kid!
you need to set up a system of equations for this problem. you set them up in a way so when you add them together, they will cancel each other out to give you the end statement.
your going to have to reverse at least one of the three data statements, remember to reverse the sign of the enthapy as well.
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