A chemist observes that 200 kJ of energy is released when a sample of liquid bromine…
CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics
Problem
A chemist observes that 200 kJ of energy is released when a sample of liquid bromine condenses completely at its boiling point. Which of the following best describes the sign of the enthalpy change for this process and its effect on the internal energy of the bromine?
(a) ΔH is positive; the internal energy of the bromine increases.
(b) ΔH is negative; the internal energy of the bromine increases.
(c) ΔH is negative; the internal energy of the bromine decreases.
(d) ΔH=0; the internal energy of the bromine decreases.