Login

Remember

Google Login
Register

PYQ's
Questions
Hot!
Unanswered
Tags
Categories
Viva Notes
Ask Question
PDF Notes

A system releases 125 kJ of heat while 104 kJ of work is done on the system. Calculate the change in internal energy.

0 votes

418 views

asked May 30, 2022 in Chapter4:Thermodynamics by Mahendra (675 points)
edited Jun 29, 2023

A system releases 125 kJ of heat while 104 kJ of work is done on the system. Calculate the change in internal energy.

Your comment on this question:

Please read the guide .

Your name to display (optional):

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

Anti-spam verification:

To avoid this verification in future, please log in or register.

Your answer

Please answer the question in detail

Your name to display (optional):

Email me at this address if my answer is selected or commented on:Email me if my answer is selected or commented on

Privacy: Your email address will only be used for sending these notifications.

Anti-spam verification:

To avoid this verification in future, please log in or register.

1 Answer

0 votes

answered May 30, 2022 by Mahendra (675 points)
selected Jun 29, 2023 by Mahendra

Best answer

Given: Q = −125kJ, W= −104kJ

ΔU = Q − W= −125−(−104)

= (−125 + 104) = −21kJ. Negative sign shows that decrease in energy.

This is the change (decrease) in the internal energy.

Your comment on this answer:

Please read the guide .

Your name to display (optional):

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

Anti-spam verification:

To avoid this verification in future, please log in or register.

Related questions

0 votes

1 answer 187 views

The second law of thermodynamics deals with transfer of: (A) work done (B) energy (C) momentum (D) heat

asked May 30, 2022 in Chapter4:Thermodynamics by Mahendra (675 points)

0 votes

1 answer 201 views

A hypothetical thermodynamic cycle is shown in the figure. Calculate the work done in 25 cycles.

asked May 30, 2022 in Chapter4:Thermodynamics by Mahendra (675 points)

0 votes

1 answer 142 views

Give an example of some familiar process in which no heat is added to or removed form a system

asked May 30, 2022 in Chapter4:Thermodynamics by Mahendra (675 points)

+1 vote

1 answer 2.8k views

The work done by a gas molecule in an isolated system is given by, W = α.β2.e-x2 / αkT, where x is the displacement, k is the Boltzmann constant and T is the

asked Mar 29, 2021 in Physics by Doubtly (98.9k points)

physics24feb2021

0 votes

1 answer 136 views

Power is a measure of the ....... (i) the rapidity with which work is done (ii) amount of energy required to perform

asked Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

0 votes

1 answer 129 views

Calculate the work done to take an object of mass 20 kg to a height of 10 m. (g = 9 8 m/s2)

asked Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

Doubtly is an online community for engineering students, offering:

Free viva questions PDFs
Previous year question papers (PYQs)
Academic doubt solutions
Expert-guided solutions

Get the pro version for free by logging in!

Most popular tags

jeemain geography-10th engineering physics semester 5 web computing

5.7k questions

5.1k answers

108 comments

557 users

Send feedback
About
faq
Linkedin
Terms of service
disclaimer
copyright
privacy policy
comments
XML Sitemap

Doubtly

...