Question

Please write out all the conversions so I can see exactly how this problem is done... especially the specific heat part! I'm confused how to calculate the specific heat.

A 9.0 V battery-operated bottle warmer heats 40.0 g of glass, 260 g of baby formula, and 185 g of aluminum from 21.0°C to 90.0°C. How much charge is moved by the battery? Submit Answer Tries 0/10 How many electrons per second flow if it takes 6.00 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.) electrons/s Submit Answer Tries 0/10

Answer 1

This heat is equal to work W = Q = qV Therefore q = Q/V = 88757.46/9 q = 9861.94 C Therefore charge moved by the battery, q = 9861.94 C Number of electrons per second N/t = q/q_e t \r\n N/t = q/q_e t = 9861.94/(1.6 times 10^-19) (6 times 60) here, N = q/q_e = total charge/charge of electron t = 6 min = (6) (608) Therefore N/t = 9861.94/576 times 10^-19 = 17.121 times 10^19 N/t = 1.7121 times 10^20 electrons/s