H2O2 + 2 Cu + H2SO4 → Cu2SO4 + 2 H2O
This is an oxidation-reduction (redox) reaction:
2 Cu0 - 4 e- → 2 CuII (oxidation)
SVI + 2 e- → SIV (reduction)
2 O-I + 2 e- → 2 O-II (reduction)
Cu is a reducing agent, H2SO4 is an oxidizing agent, H2O2 is an oxidizing agent.