The temperature on a winter day is 14degreeT. What is the temperature in degrees
ID: 1416171 • Letter: T
Question
The temperature on a winter day is 14degreeT. What is the temperature in degrees Celsius? The temperature on a warm summer day is 104degreeF. What is this temperature a) in degrees Celsius? b) on the absolute (Kelvin) scale? How much heat is required to raise the temperature of 80 g of water from 10degreeC to 95degreeC ? How much heat must be added to 100 g of ice at 0degreeC to melt the ice completely? How much heat must be added to 50 g of water at an initial temperature of 20degreeC to a) heat it to the boiling point? b) completely convert the 100degreeC water to steam?Explanation / Answer
E2) C = (F - 32) * 5/9
given F=14o
C =(14-32) * 5/9= -18 * 5/9
C=-10o
E4) we use the same conversion for fahrenheit to celsius
C = (F - 32) * 5/9
C=(104-32) *5/9=72 *5/9
C=40o
We know that k=C+273.15
Therefore K=40+273.15
K=313.15 o
E6) Q=m *s*T
s=4.186 joule/gram °C
Q= 80 *4.186 *(95-10)
Q=80 *4.186 *85
Q=28464.8 Joules
E8) Latent heat of fusion=L=2256 kJ/kg
333 * 103/1000 J/g
Q=m*L
Q=100 * 333 J
Q=33300 J
E10) heat required to heat it to boiling point i.e at 100oc
Q=m *s*T
s=4.186 joule/gram °C
Q= 50 *4.186 *80
Q=16744 J
To convert water to steam
Q=m*L
Where l is latest heat of vaporisation=2256 kJ/kg=2256 J/gm
Q=mL=50 *2256
Q=112800 J
GOOD LUCK!!!
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