Answer to Question #49499 in Organic Chemistry for Joe

Question

Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25 ∘C to 32.33 ∘C.

1.Find ΔErxn for the combustion of naphthalene. The heat capacity of the calorimeter, determined in separate experiment, is 5.11kJ/∘C.

Consider the following generic reaction: A+2B→C+3D, ΔH = 125kJ . Determine the value of ΔH for each of the following related reactions:
1. 3A+6B→3C+9D
2. C+3D→A+2B
3. 1/2C+3/2D→1/2A+B

Write an equation for the formation of NO2(g) from its elements in its standard states.
Find ΔH∘f for NO2(g) from Appendix IIB in the textbook
Write an equation for the formation of MgCO3(s) from its elements in its standard states. Write any reference to carbon as C(s).
Find ΔH∘f for MgCO3(s) from Appendix IIB in the textbook.
Write an equation for the formation of C2H4(g) from its elements in its standard states. Write any reference to carbon as C(s).
Find ΔH∘f for C2H4(g) from Appendix IIB in the textbook.