A47.35 g mass of copper is heated from 20 degrees celsius to 85 degrees celsius. how many joules were added to accomplish this?

1185.0 J.

Explanation:

Q = m.C.ΔT, where,

Q is the amount of heat needed,

m is the mass of the copper (m = 47.35 g),

C is the specific heat of Cu (C = 0.385 J/g.°C),

ΔT is the temperature difference (the final temperature - the initial temperature (ΔT = 85.0 - 20.0 = 65.0 °C).

∴ The amount of heat needed Q = m.C.ΔT = (47.35 g) (0.385 J/g.°C) (65.0 °C) = 1184.933 J ≅ 1185.0 J.

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.