Register
A heat engine has a cold reservoir of 250°C and a hot reservoir of 715°C. What is the efficiency of the engine?
22.2k views
3 votes
A heat engine has a cold reservoir of 250°C and a hot reservoir of 715°C. What is the efficiency of the engine?

User Mohsen Dorparasti
by
8.4k points

2 Answers

2 votes

The answer is A. 65.0% for plato users, i got 100% on the test :)

User Estebanpdl
by
7.7k points
3 votes
If the heat engine is a perfect carnot cycle engine, then
efficiency = (T2-T1)/T2
where T1=temperature of cold reservoir ( ° K) = 250+273.15 = 523.15
T2=temperature of hot reservoir ( ° K) = 715+273.15 = 988.15

Therefore
efficiency = (T2-T1)/T2 = (988.15-523.15)/988.15 = 0.4706 = 47%

Note: this is the theoretical maximum efficiency of a perfect heat engine. Real-life engines do not achieve this value.
User HMLDude
by
8.5k points
← Prev Question Next Question →

Related questions

Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

At sea level, water boils at 100 degrees celcius and methane  boiled at -161 degrees celcius. Which of these substances has a stronger force of attraction between its particles? Explain your answer
Physical properties of minerals graphic organizer
A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how high (in m) was the building?
What type of rock is the Haystack rock (igneous, Metamorphic, or Sedimentary)
what is a device that transforms thermal energy to mechanical energy
Link Copied!