Question

specific heat of aluminum: 0.900

Specific heat of glass: 0.840

19.8- Electric Potential Energy: Potential Difference A 12.0 V battery-operated bottle warmer heats 40.0 g of glass, 220 g of baby formula, and 200 g of aluminum from 24.0°C to 93.0°C. How much charge is moved by the battery? Submit Answer Tries 0/10 How many electrons per second flow if it takes 4.90 min to warm the formula? (Hint: Assume that the specific heat of baby formula is about the same as the specific heat of water.) (You do not need to enter any units.) Submit Answer Tries o/10

Answer 1

Energy = Q delta V = m_1 c_1 delta T + m_2 c_2 delta T + m_3 c_3 delta T Q times 12 = (40 times 0.84 + 220 times 4.186 + 200 times 0.9) times (93 - 24) Q = 65223.5 No. of electrons/sec = Q/t times e = 6523.5/4.9 times 60 times 1.6 times 10^-19 = 1.39 times 10^20 No. s/sec