GCSE Physics P1 Question

  • 0 votes

Many houses in the UK have double-glazed windows.

If the window is double-glazed rather than single glazed there is less condensations on the inside of the glass. Explain why. (2 marks)

I found this question in a past paper but I can't find the mark scheme for it: (Physics P1 Higher Tier. Wednesday 20th June 2012) and it would be really helpful if you could let me know.. Thanks :)

Posted Sun 13th January, 2013 @ 14:26 by Crystal Blue ♥

3 Answers

  • 1 vote

I'm not sure about what 'buzzwords' and terminology the markscheme is looking for, but here is the answer to the question if that is what you were asking:

"A double-glazed window traps gas between its panes. Gases are excellent insulators as their particles are further apart than those of solids. Meanwhile, a single, solid window pane consists of closely packed particles which transfer heat more effectively.

A double glazed window is a better insulator - it maintains a house's warm temperature. This prevents warm water vapour on the inside meeting cold air on the outside, which would lead to the water's condensation on the inside window surface."

I wouldn't include the first paragraph in an answer unless the question specifically asks you explain the effect in terms of particles. Or unless you've got time to kill

Good luck!

EDIT: Just looked up a markscheme for a similar question. It states:


Double glazing provides (better) insulation

(Inside of) glass is not as cold


*Double glazing has a lower U-value

*Less energy/heat transfer through double glazing

*Window stays warm(er)

Answered Sun 13th January, 2013 @ 18:18 by Bodgy
Edited by Bodgy on Sun 13th January, 2013 @ 18:30
  • 0 votes

Apparently the exam boards don't put up the mark schemes for the public until ages after the exam was taken, like a year or so afterwards.

So if you want the mark scheme you might have to pay; unless you can ask your teacher because teachers get access to all that stuff.

Hope this helps :)

Answered Sun 13th January, 2013 @ 16:18 by :) PurpleJaguar (: - Team GR
  • 0 votes

Thank you :)

Answered Mon 14th January, 2013 @ 17:13 by Crystal Blue ♥