Your SlideShare is downloading. ×
A2 /EXPT/THER/RON/FIONA
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

A2 /EXPT/THER/RON/FIONA

162
views

Published on

Published in: Business, Technology

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
162
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
1
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. To identify the specific lantent heat of water by electric method Ron & Fiona
  • 2.  
  • 3.  
  • 4. Steps to Follow
    • Weigh the mass of water, m
    • Put the glass of water into a heat insulator
    • Set up the circuit shown in the diagram
    • Measure the initial temperature of water, T 1
    • Read the current from the ammetre, I. And we know the votlage of the battery, V.
    • Switch on. Record the time taken to every 10 degrees rise in temperature of water. Record the times t 1 , t 2 , t 3 , etc.
  • 5. c 3 t 3 c 2 t 2 c 1 t 1 c 5 t 5 c 4 t 4 The specific heat capacity of water (Jkg -1 K -1 ) Time taken to rise 10 o C in Temperature of water
  • 6. Analysis of data
    • Total energy used: E=VIt
    • From E=cm△t
    • we can get cm△t=VIt
    • Here △t=10
    • Therefore, c = VIt / 10m
    • Then we get c 1 , c 2 , c 3 … from t 1 , t 2 , t 3 …
    • Now take the average.
  • 7. Safety precausions
    • Do not raise the temperature of water to too high, i.e. boiling point.
    • Do not touch the wet wires and resistor.
  • 8.
    • Random error:
    • - heat loss when heating
    • - errors when reading the thermometre
    • Improvements:
    • - use an insulator that fit the glass so that there is as little air as possible in the insulator
    • - do more times to take average (exactly what we have done)

×