A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 5 years ago

In a cabin sauna, 85 l of lake water at a temperature of +7°C is heated in an iron pot of 29 kg. The water temperature must be +86°C. The temperature of the iron pot is +12 °C before the water is poured in. The water is heated by fire wood and 65 % of the thermal energy released in combustion is wasted. The heating value of the fire wood (thermal energy released in combustion of one kilogram) is 12 MJ/kg. How much fire wood is needed to heat the water? The specific heat capacity of iron is 473 J/kg°C, and the specific heat capacity of water is 4190 J/kg°C. Give the answer in 0,1 kg precision.

  • This Question is Closed
  1. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    .....thats over my head. When I was in charge of the scout troop we just got some wood togther and built a campfire :)

  2. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...


  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.