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 :)
- 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
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)
- 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 :)
- 0 votes
Thank you :)