10TH GRADE PRACTICE
Physics Problems: Thermodynamics, Grade 10
Internal energy, heat, work and cycles.
Here the conditions and analysis of the solution can be read without an account. In the simulator, you need to collect the same analyzes yourself: “Given,” formulas, order of steps and answer.
Problem statements
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Problem #3
Thermodynamics: internal energy and heat transferice taken from , you need to melt it and heat the resulting water to . How much heat will be required?
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First the ice melts, then the resulting water is heated.
Answer
Problem #82
Thermodynamics: internal energy and heat transferHow much heat is required to ice at turn into water vapor ?
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Four stages: heating ice, melting, heating water, evaporation.
Answer
Problem #83
Thermodynamics: internal energy and heat transferDefine internal energy helium at .
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Helium is monatomic, so there are three degrees of freedom per molecule.
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Problem #84
Thermodynamics: internal energy and heat transferHow much alcohol do you need to burn to melt? lead taken from ?
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Lead is first heated to its melting point and then melted.
Answer
Problem #85
Thermodynamics: heat enginesHeater temperature , refrigerator . What is the maximum efficiency? How much heat does the machine receive from the heater if it is given to the refrigerator? ?
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The maximum efficiency is given by the Carnot cycle.
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Problem #86
Thermodynamics: internal energy and heat transferA monatomic gas is heated isobarically at pressure . Volume increased by . Determine the work done, the change in internal energy, and the heat gained.
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In an isobaric process, work accounts for two-fifths of the heat input.
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Problem #87
Thermodynamics: internal energy and heat transferThe bath is filled water at . How much water at need to be added to get ?
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Heat balance equation; the specific heat capacity decreases.
Answer
Problem #88
Thermodynamics: internal energy and heat transferInto the water at threw a piece of ice at . The temperature dropped to . What is the initial mass of water?
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The ice first melts, then the resulting water is heated to a common temperature.
Answer
Problem #89
Thermodynamics: internal energy and heat transferIn a glass of mass poured water at . How much ice at must be added to cool the system to ?
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On the left the glass and water give off heat, on the right the ice heats up, melts and heats up like water.
Answer
Problem #90
Thermodynamics: internal energy and heat transferMass into the water at let me in water vapor at . What temperature will it be?
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The steam first condenses, then the resulting water cools.
Answer
Problem #91
Thermodynamics: internal energy and heat transferDetermine work during isobaric expansion nitrogen, if the initial temperature , and the volume increased by times.
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Problem #93
Thermodynamics: internal energy and heat transferIn a steel mug weighing there is water at . A copper cylinder with a mass of at . After heat exchange the temperature became . What is the mass of water?
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The mug and water heat up, the copper cylinder cools down.
Answer
The theory behind these problems
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Formulas by topic
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