How much heat energy is used to boil the water How many Joul

How much heat energy is used to boil the water? How many Joules are delivered to the bulb?                               

Calculate the efficiency of the steam engine / generator setup.   

Introduction: The efficiency of any heat engine is defined as the work out divided by the heat energy in We can examine Watt\'s steam engine and determine the thermodynamic efficiency if we can find the heat input and the ork that the engine accomplishes. n this simple engine setup we will drive a generator and illuminate a light bulb According to our physics book, it takes 2259 Joules of heat energy just to vaporize one gram of water It also requires 314 Joules of heat to raise 1 gram of room temperature water to 100 degrees C. Adding both says that one gram of water requires 2,573 Joules to generate steam at 100 degrees C. Using this steam we can turn a simple steam engine coupled to an AC generator. By knowing the Wattage of the light bulb, and how long power is provided to it, we can obtain the work output of our engine. We will make the assumption that all of the mechanical work energy obtained from the engine goes into lighting the small light bulb We will place a certain amount of water into the boiler and run the engine until all of the water has turned into steam. From this we can calculate our heat input. We are making the assumption that all of the heat energy input goes to heat the water which in practice is not really true since some heat is lost to thermal convection and conduction effects In an old style locomotive, a good percentage of the heat energy went out the smoke stack of the engine! n Work out (Joules) Thermal energy in (Joules Procedure Set up the engine. Add 100 grams of water to the boiler. Place a small Bunsen Burner under the boiler and heat the water. Record the time that the engine operates. Write-up Include in your report the following a) ntroduction 5 points b) Procedure 5 points c) Observations 10 points d) How much heat energy is used to boil the water 20 points e) How many Joules are delivered to the bulb 20 points Calculate the efficiency of the steam engine generator setup. 30 points g) Conclusion 10 points

Solution

The answer of the following question is as follows

The required heat energy is 3400J/kg.

The rate of energy delivering to the bulb is 950 J/kg

Rest energy is rejected from the system