0
Electrical methods to determine specific heat capacity of water A21  E ditor: Fred  Critical thinker: John
Diagram and set of equipments
Steps to be followed <ul><li>W eigh the empty calorimeter to get mass(m 1 ),fill the calorimeter with water to get mass(m ...
Method to collect data <ul><li>Find the mass of water (m w )=mass of calorimeter with water(m 1 )-mass of calorimeter with...
Safety Measures <ul><li>Do not set too high voltage on power supply </li></ul><ul><li>Make sure the thermometer is far fro...
Method to reduce error <ul><li>Use a calorimeter with small capacity to prevent heat loss. </li></ul><ul><li>Repeat the ex...
Upcoming SlideShare
Loading in...5
×

A2 /Expt /Thermal /John/ Fred

139

Published on

Published in: Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
139
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
1
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "A2 /Expt /Thermal /John/ Fred"

  1. 1. Electrical methods to determine specific heat capacity of water A21 E ditor: Fred Critical thinker: John
  2. 2. Diagram and set of equipments
  3. 3. Steps to be followed <ul><li>W eigh the empty calorimeter to get mass(m 1 ),fill the calorimeter with water to get mass(m 2 ). </li></ul><ul><li>I nsert the digital thermometer and heat coil into the calorimeter to get change in temperature ( ∆ t) and change in heat ( ∆Q ) , put it in the lagging and put the cover on the calorimeter to prevent heat loss. </li></ul><ul><li>C onnect heat supply and joule meter with electric coil. </li></ul>
  4. 4. Method to collect data <ul><li>Find the mass of water (m w )=mass of calorimeter with water(m 1 )-mass of calorimeter without water(m 2 ) </li></ul><ul><li>E.g. (m w )=0.200kg(m 1 )-0.100(m 2 )=0.100kg </li></ul><ul><li>Find the change in temperature ( ∆t)=final temperature(t 1 )- initial temperature(t 2 ) </li></ul><ul><li>E.g. ( ∆t )=30 0 c(t 1 )-20 o c(t 2 )=10 o c </li></ul><ul><li>Find the change in heat ( ∆Q )=final heat(Q1)-initial heat(Q2) </li></ul><ul><li>E.g. ( ∆Q)=5000J(Q1)-2000J(Q2)=3000J </li></ul><ul><li>According to the equation Q=mc ∆t c=Q/m ∆t </li></ul><ul><li>C =3000J/(0.100kg x 10K)=3.0 x 10 3 Jkg -1 K -1 </li></ul>
  5. 5. Safety Measures <ul><li>Do not set too high voltage on power supply </li></ul><ul><li>Make sure the thermometer is far from the heat coil to prevent the break of thermometer. </li></ul>
  6. 6. Method to reduce error <ul><li>Use a calorimeter with small capacity to prevent heat loss. </li></ul><ul><li>Repeat the experiment to get accurate results. </li></ul>
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×