Corroding iron. The reason why iron corrodes is that it reacts with the oxygen in the air to create iron oxide which is what we call rust. when iron turns to rust, the chemical identity of the iron changes.
when you break ice, the ice is still ice. that water did not change into something else. when you run a current through copper, the electrons in the copper move due to the voltage but the copper is not changing. After the circuit stops, the copper wires are still made out of copper (the copper did not undergo a chemical change). When you melt gold, the gold is only going from solid form to liquid form. The gold has not changed chemically, it just underwent a phase change.
I hope this helps. Let me know if anything is unclear.
The question has missing information! But, with the objects and their respectives masses and specific coefficiets and with the following explanation, the question can be aswered!
Answer:
The one which has the highest product of the mass by specific heat.
Explanation:
The heat is a way of "energy in motion", which means that is a way that energy can be exchanged between substances. This exchange occurs when there is a difference in the temperature of the substances that are in contact, and then, to achieve thermal equilibrium, one substance loses heat (the one with higher temperature) and had a decrease in temperature, and the other gain heat and had an increase of temperature.
The heat loss is the same heat gained, and it can be calculated. If the substance doesn't suffer a physical change (which is the case here), then:
Q = m*c*ΔT
Where Q is the heat, c is the specific heat, and ΔT is the temperature change. So, rearranged the expression:
ΔT = Q/(m*c)
Because Q is the same for all of the objects, the one that will experience the smallest temperature change is the one that has the highest value of m*c (because it is indirectly proportional to ΔT).
The Ksp of cobalt(II) hydroxide is equal to [OH-]2[Co2+]=5.92*10-15. And [OH-]=2[Co2+]=2*[Co(OH)2](dissolved). So the molar solubility of this compound is 1.14*10-5 M.
2.-> At the equivalence point, the pH = 7.00 for strong acid- strong base titrations.
3.-> A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10. It will appear pink in basic solutions and clear in acidic solutions.
