Chapter U5, Problem 15RE

Interpretation Introduction

Interpretation: The reason is to be identified why all the thermal energy produced in an internal combustion engine cannot be converted into work.

Concept introduction: To do the work internal combustion engines use the gases that produced in combustion reaction, water vapor and carbon dioxide.

Answer to Problem 15RE

D. some of energy is lost to the surrounding as heat.

Explanation of Solution

D. Steam engines and internal combustion convert thermal energy into work. All thermal energy that produces in an internal combustion engine cannot be converted into work because some of the energy is lost to the surroundings as heat. Loss of heat to the surroundings is connected to entropy and second law of thermodynamics.

Conclusion

  A. Combustion is an endothermic process, so heat is absorbed by the system.

Combustion is an exothermic process.

  B.Unlike matter, energy can be created or destroyed.

Energy cannot be created or destroyed.

  C.Combustion is an exothermic process, so heat is absorbed by the system.

Some of thermal energy is disappear to the surroundings as heat.