joule per kilogram kelvin J kg-1 K-1 joule per gram kelvin J g-1 K-1 joule per gram degree Celsius J g-1 oC-1 calorieIT per gram degree Celsius calIT g-1 oC-1 British thermal unitIT per pound degree Fahrenheit BtuIT lb-1 oF-1 British thermal unitIT per pound degree Rankine BtuIT lb-1 oR-1 calorieth per gram degree Celsius calth g-1 oC-1 British thermal unitth per pound degree Fahrenheit Btuth lb-1 oF-1 British thermal unitth per pound degree Rankine Btuth lb-1 oR-1