When sketching an energy diagram for the condensation of water vapor to liquid water at 100 °C and 1 atm, which description most accurately represents the diagram?
a) Products lower in energy than reactants; enthalpy arrow points upward, indicating heat absorption.
b) Products lower in energy than reactants; enthalpy arrow points downward, indicating heat release.
c) Products higher in energy than reactants; enthalpy arrow points upward, indicating heat absorption.
d) Reactants and products at the same energy; enthalpy arrow is horizontal, indicating no heat exchange.