How do you convert temperature differences between Celsius and Kelvin?

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The temperature difference of 57.0°F converts to 31.67°C. This value remains the same when expressed in Kelvin as a temperature difference, resulting in 31.67K. The key point is that the size of a degree Celsius and a Kelvin are equivalent, but their zero points differ. Therefore, when measuring temperature differences, the zero point does not affect the numerical value. Understanding this concept clarifies why both Celsius and Kelvin yield the same difference in this context.
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Homework Statement


The temperature difference between the inside and the outside of a home on a cold winter day is 57.0°F.

express in C and in K


Homework Equations



Tf = (9/5) delta Tc
Tc = Tk - 273.15

The Attempt at a Solution



I used the first equation to find that the temp difference in C is 31.67
I then thought that you added 273 to that temperature to find Kelvin but on my homework the answer key said that the correct answer is 31.67K ... i don't understand how the two can be equal?
 
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The size of a kelvin and the size of a degree C are the same (by definition) they are only different in where you start counting from

If you are measuring a temperature difference does the zero point of the scale matter?
 
lizlyn said:
Tf = (9/5) delta Tc

That's to convert changes in temperature between Celsius and Fahrenheit scales.
 

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