Question

a) Dalton assumed that all atoms of the same element are identical in all their properties. Explain why this assumption is not valid.

B) Consider four 100.0 g samples of water, each in a separate beaker at 25.0 ºC. Into each beaker you drop 10.0 g of a different metal that has been heated to 95.0 ºC. Assuming no heat loss to the surroundings, which water sample will have the highest final temperature? please explain and THANK YOU SO MUCH MAY GOD BLESS YO HEART

Answer 1

• What Dalton didn't know is that there can be different numbers of neutrons in atoms of the same element. Atoms with same number of protons with different neutrons are called isotopes. The discovery of isotopes indicated that all the atoms of the same element are not perfectly identical in all respects. For example 1H¹, 1H², 1H³.
• Adding the metal with less specific heat capacity will have the lowest final temperature. Since it has less heat capacity, it will take less energy to heat it so it will release less energy to water.