An electrical heater is used to heat 1 litre of water from 14C to the boiling...
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An electrical heater is used to heat 1 litre of water from 14C to the boiling temperature at atmospheric pressure. (c) Derive an expression for the water temperature as a function of time (d) If heater delivers 1000 W to the water, how long does it take until the boiling temperature is reached? Without neglecting heat losses to the environment, and the heat capacities of the heating element and the container. Data: Mass of heater and container = m=400 g Specific heat capacity of heater and container= Cpk = 0.5 kJ kgK- Specific heat capacity of water = Cpw = 4200 J kg K- Surface area of container = A = 0.1 m Ambient air temperature = To= 20 C Overall heat transfer coefficient (Uloss) = 10 WmK- An electrical heater is used to heat 1 litre of water from 14C to the boiling temperature at atmospheric pressure. (c) Derive an expression for the water temperature as a function of time (d) If heater delivers 1000 W to the water, how long does it take until the boiling temperature is reached? Without neglecting heat losses to the environment, and the heat capacities of the heating element and the container. Data: Mass of heater and container = m=400 g Specific heat capacity of heater and container= Cpk = 0.5 kJ kgK- Specific heat capacity of water = Cpw = 4200 J kg K- Surface area of container = A = 0.1 m Ambient air temperature = To= 20 C Overall heat transfer coefficient (Uloss) = 10 WmK-
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c To derive an expression for the water temperature as a function of time we can use Newtons Law of ... View the full answer
Related Book For
Elementary Principles of Chemical Processes
ISBN: 978-1119498759
4th edition
Authors: Richard M. Felder, ? Ronald W. Rousseau, ? Lisa G. Bullard
Posted Date:
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