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Water heater In a water heater, tap water with the temperature 10 degrees celcius is heated to...

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Physics

Water heater

In a water heater, tap water with the temperature 10degrees celcius is heated to 60 degrees celcius. For a shower, atotal of 20 litres of water is used. Water from the water heater ismixed with tap water to reach the temperature 35 degrees celciuswhen one showers.

  1. How much ENERGY is needed to heat 10 litres of waterfrom 10 celcius to 60 celcius?

  2. How much EXERGY is needed to heat 10 litres of waterfrom 10 celcius to 60 celcius?

  3. How much ENERGY is needed to heat 20 litres of waterfrom 10 celcius to 35 celcius?

  4. How much EXERGY is needed to heat 20 litres of waterfrom 10 celcius to 35 celcius?

  5. What is the change in entropy when 10 litres of waterwith the temperature 10 celcius is mixed with 10 litres of waterwith the temperature 60 celcius?

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