Question bank: Thermodynamics: Thermal Transformations

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Question 1:

Medium

A company is developing a project for a thermal engine that uses air as the working substance. At a certain stage of the cycle, the air is at a pressure of 2 atm and a volume of 0.05 m³, and undergoes an isothermal compression process until reaching the final volume of 0.03 m³. Considering that the air behaves as an ideal gas and that the temperature remains constant during the process, answer the following items: a) What is the final pressure of the air after compression? b) Calculate the work done on the air during compression. c) Based on the information obtained, describe the implications of increasing or decreasing the final volume in the isothermal process and how this can affect the efficiency of the thermal engine.

Thermodynamics: Thermal Transformations

Question 2:

Medium

Thermodynamics: Thermal Transformations

Question 3:

Very Easy

A cylinder containing an ideal gas undergoes an isobaric transformation, during which 500 J of heat is supplied to the gas. The transformation starts with the gas in a state where its pressure is 2 atm, its volume is 0.04 m³, and its temperature is 300 K. Considering that the gas behaves according to the equation PV = nRT, where P is the pressure, V is the volume, n is the amount of substance, R is the ideal gas constant (8.31 J/mol*K), and T is the temperature in Kelvin, calculate: 1) The variation of internal energy of the system during the transformation. 2) The variation of internal energy of the system if the transformation were carried out isothermally, keeping the temperature constant at 300 K.

Thermodynamics: Thermal Transformations

Contextualized Question

Calculus Question

Question 4:

Medium

Thermodynamics: Thermal Transformations

Question 5:

Medium

The Mayer Relation can also be used to establish a relationship between the macroscopic properties of the thermodynamic system, such as temperature, pressure, volume, etc., which are easily determined experimentally for perfect monoatomic or diatomic ideal gases. Which one of them cannot be calculated using this relationship?

Thermodynamics: Thermal Transformations

Contextualized Question

IARA TIP

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