State two essential requirements of an ideal heat engine?

EduRev

All Courses

Explore Courses UPSC Exam UPSC Test Series Free Notes EduRev Infinity

Open App

Class 11 Exam > Class 11 Questions > State two essential requirements of an ideal ...

Join the Discussion on the App

State two essential requirements of an ideal heat engine?

Join for Free

Join for Free

Verified Answer

State two essential requirements of an ideal heat engine?

Heat engines differ considerably from one another, but all can be characterized by the following:

1. They receive heat from a high-temperature source (solar energy, furnace etc.).

2. They convert part of this heat to work.

3. They reject the remaining waste heat to a low-temperature sink (the atmosphere, rivers, etc.).

4. Heat engines are cyclic devices.

This question is part of UPSC exam. View all Class 11 courses

View all answers Start learning for free

Explore Courses for Class 11 exam

Similar Class 11 Doubts

One mole of an ideal monoatomic gas expanded irreversibly in two stage expansion.State-1 (8.0 bar, 4.0 litre, 300 K)State-2 (2.0 bar, 16 litre, 300 K)State-3 (1.0 bar, 32 litre, 300 K)Total heat absorbed by the gas in the process is

View answer

According to Carnot theorem no heat engine working between two given temperatures of source and sink can be more efficient than a perfectly ___________ engine working between the same two temperatures

View answer

The second law of thermodynamics says

View answer

Importance of high specific heat capacity of water for life Specific heat capacity of a substance is the amount of heat required to raise the temperature of that substance by 1 K. It is expressed in the units J/ (kg K). A high specific heat of a substance means that a large amount of heat is required to raise the temperature of the substance. Water has the highest known specific heat capacity. Its specific heat capacity is 4.186 K J/ (kg K) i.e. to raise the temperature of 1 kg of water by 1 Kelvin it requires 4.186 KJ of heat. For comparison sake, Copper requires only 385 Joules of heat to raise 1 kilogram of copper by 1 Kelvin. It also interesting to know that the specific heat capacities in two other phases of water (i.e. ice and water vapour) are less than this. High specific heat of water is mainly due to the presence of a large number of hydrogen bonds between molecules of water. On a beach on a sunny day, it is noticed that the sand is often quite hot to walk on, but the water is always cool, even in the shallows. This is because sand has a lower specific heat capacity than that of water. Sand takes less energy to raise the temperature by one degree. Because water has a high specific heat capacity, it requires more energy to raise the temperature by one degree. Since the sun puts same rate of energy on water and sand, which heats up sand more quickly and water more slowly. Water covers around 70% of the Earth's surface and its high specific heat plays a very important role to sustain life in the earth. It is able to absorb a lot of heat without a significant rise in the temperature. When temperatures decrease, the heat which is stored is released, restraining a rapid drop in temperature. The combined effect is the buffering of heat. A relatively constant temperature without sudden rise and drop is essential to sustain life. Hence water is important for life.Q. Which statement is false?

View answer

Importance of high specific heat capacity of water for life Specific heat capacity of a substance is the amount of heat required to raise the temperature of that substance by 1 K. It is expressed in the units J/ (kg K). A high specific heat of a substance means that a large amount of heat is required to raise the temperature of the substance. Water has the highest known specific heat capacity. Its specific heat capacity is 4.186 K J/ (kg K) i.e. to raise the temperature of 1 kg of water by 1 Kelvin it requires 4.186 KJ of heat. For comparison sake, Copper requires only 385 Joules of heat to raise 1 kilogram of copper by 1 Kelvin. It also interesting to know that the specific heat capacities in two other phases of water (i.e. ice and water vapour) are less than this. High specific heat of water is mainly due to the presence of a large number of hydrogen bonds between molecules of water. On a beach on a sunny day, it is noticed that the sand is often quite hot to walk on, but the water is always cool, even in the shallows. This is because sand has a lower specific heat capacity than that of water. Sand takes less energy to raise the temperature by one degree. Because water has a high specific heat capacity, it requires more energy to raise the temperature by one degree. Since the sun puts same rate of energy on water and sand, which heats up sand more quickly and water more slowly. Water covers around 70% of the Earth's surface and its high specific heat plays a very important role to sustain life in the earth. It is able to absorb a lot of heat without a significant rise in the temperature. When temperatures decrease, the heat which is stored is released, restraining a rapid drop in temperature. The combined effect is the buffering of heat. A relatively constant temperature without sudden rise and drop is essential to sustain life. Hence water is important for life.Q. Specific heat capacity of water is

View answer

Top Courses for Class 11View all

CUET Mock Test: Humanities Subjects 2025

Psychology Practice Tests: CUET Preparation

Top Courses for Class 11

View all

State two essential requirements of an ideal heat engine?

Share with a Friend

Answer this doubt

Question Description
State two essential requirements of an ideal heat engine? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about State two essential requirements of an ideal heat engine? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for State two essential requirements of an ideal heat engine?.

Solutions for State two essential requirements of an ideal heat engine? in English & in Hindi are available as part of our courses for Class 11. Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.

Here you can find the meaning of State two essential requirements of an ideal heat engine? defined & explained in the simplest way possible. Besides giving the explanation of State two essential requirements of an ideal heat engine?, a detailed solution for State two essential requirements of an ideal heat engine? has been provided alongside types of State two essential requirements of an ideal heat engine? theory, EduRev gives you an ample number of questions to practice State two essential requirements of an ideal heat engine? tests, examples and also practice Class 11 tests.

Explore Courses for Class 11 exam