How do you convert temperature differences between Celsius and Kelvin?

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SUMMARY

The temperature difference between Celsius and Kelvin is calculated using the formula Tf = (9/5) delta Tc for converting Fahrenheit to Celsius. In this discussion, a temperature difference of 57.0°F corresponds to 31.67°C. The confusion arises from the misconception that adding 273.15 to the Celsius temperature difference yields the Kelvin difference; however, the difference remains the same at 31.67K because both scales have the same incremental value. The key takeaway is that when measuring temperature differences, the zero point of the scale does not affect the difference itself.

PREREQUISITES
  • Understanding of temperature scales: Celsius, Kelvin, and Fahrenheit
  • Familiarity with temperature conversion formulas
  • Basic algebra for manipulating equations
  • Knowledge of the significance of absolute zero in temperature measurement
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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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