A 23.2 g sample of copper if heated to 97.4°C and placed in a coffee cup calorimeter containing 100.0 g of water at 25.2°C. After the metal cools, the final temperature of the metal and water is 23.0°C.
Which substance absorbed heat and which one released heat?

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.