ACS Chemistry Practice Exam 2026 – The All-in-One Guide to Exam Success!

The conversion between calories and Joules is a fundamental concept in thermodynamics and chemistry. One calorie is defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius (or one Kelvin) at standard atmospheric pressure. This energy measurement is approximately equivalent to 4.184 Joules.

This conversion factor is crucial in various scientific calculations, especially those involving heat transfer and energy changes in chemical reactions. The value of 4.184 J is widely accepted and used in both academic and practical applications, making it a standard conversion factor in scientific literature.

The other options do not accurately represent the conversion, reinforcing the importance of using the correct value in calculations involving calories and Joules.