A 200-L Electric Water Heater Uses 2

Multiple Choice

A 200-L electric water heater uses 2.0 kW. Assuming no heat loss, how many hours would it take to heat the water in this tank from 23°C to 75°C? The specific heat of water is 4186 J/kg ∙ K and its density is 1000 kg/m³.

A) 5.0. hours
B) 6.0 hours
C) 7.0 hours
D) 8.0 hours