In order to test the claim, your friend heats 5.0 g of CaCO3 strongly for 10 minutes over a Bunsen burner flame to cause the chemical reaction to occur. You can see gases coming off. After cooling, he measures the mass of the products formed and finds it is 2.9 grams.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

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