Heat And Temperature Flashcards
1 cal =
4.186 J
Kelvin, Celsius, Fahrenheit scale relation
(Tk-273)/100=Tc/100=(Tf-32)/180
Branch dealing with measurement of temperature is
Thermometry
Thermometric properties equation
(Xt-Xo)/t = (Xioo-Xo)/100
Triple point
It refers to the point where the gaseous,solid and liquid states of water coexist in equilibrium
Triple point equation
T/Ttrp = X/Xtrp
T=[X/Xtrp x 273.15]K
Types of thermometers
- Constant volume gas thermometer
T=p/ptrp x 273.16 - Platinum Resistance Thermometer
T= R/Rtrp x 273.16 - Mercury Thermometer
T= l/ltrp x 273.16
Types of thermal expansion
- Linear expansion
L’ =L(1+@/\T)
@-coefficient of linear expansion - Areal Expansion
A’ = A(1+beta/\T)
Beta-coefficient of areal expansion - Volume Expansion
V’ = V(1+gama/\T)
Gama-coefficient of cubical expansion
Why do liquids overflow
Apparent expansion of liquids
Coefficient of cubical expansion is greater for liquids than solids and hence they overflow when completely filled in a container. This termed as apparent expansion of liquid
Dulong and Petits method
Coefficient of specific heat= ht-ho/hot
Anomalous expansion of water
Water contracts from 0-4C
Coefficient of specific heats = 1/T = 1//\T(/\V/V)
Heat capacity =
/\Q = mc/\T
Principle of calorimetry
Amount of heat lost = Amount of heat gained
OR
Heat lost by body 1=Heat gained by body 2
Latent heat =?
Q = mL
Water Equivalent
Of a substance refers to the amount of water which when replaced with the substance gives same rise in temperature and requires same amount of heat for the rise
MwCw = MsCs
