A capacitor is made of two parallel plates whose areas are 0.4 m2. Initially the distance between the plates is 2.3 cm, and the capacitor is connected to a 2.5 Volt battery. The capacitor is disconnected from the battery. Then the distance between its plates is changed to 1.9 cm. After this the capacitor plates are connected to another battery, which supplies 7.0 Volts.
What amount of charge flows from the capacitor to the new battery when they are connected?