5. HS-PS1-4 Butane, C, H,, is the fuel found in barbeque lighters. When butane reacts with oxygen gas the following is the balanced chemical equation:
2 C. H.0 (1) + 13 02 (9) — 8 CO2 (g) + 10 H,0 (9)
The reaction releases energy in the form of heat and light. Which of the following statements is
the correct explanation for this reaction?
A. The energy required to break the bonds in the reactants are much greater than
the energy released when bonds are formed in the products, therefore this is an
endothermic reaction.
B. An energy input is NOT required to break bonds in the reactants and this
activation energy is released as heat and light.
C. Energy is absorbed when new bonds are formed in the products and this causes
the environment to heat up.
D. The energy released when the bonds formed in the products is greater than the
energy required to break the bonds in the reactants, therefore this is an
exothermic reaction.
E. The nuclei of each atom swaps their protons and neutrons and in the process
energy is released and this reaction is exothermic.