1. electrical; chemicalchemical; electricalthermal; nuclearnuclear; electromagnetic2. AgNO3KeyAgAg+3. To serve as the cathodeTo force a nonspontaneous reactionTo force a spontaneous reactionTo serve as the anode4. Copper atoms will be reduced to form copper atoms that will electroplate onto the surface of the key Copper atoms will be oxidized to form copper ions that will electroplate onto the surface of the keyCopper atoms will be oxidized to form copper atoms that will electroplate onto the surface of the keyCopper ions will be reduced to form copper atoms that will electroplate onto the surface of the key 6. Voltaic cells are spontaneous and electrolytic cells are nonspontaneousThey are both spontaneousVoltaic cells are nonspontaneous and electrolytic cells are spontaneousThey are both nonspontaneous7. n an electrolytic cell energy is and in a voltaic cell energy is