University:
Boston University
Course:
CAS CH 101 | General Chemistry 1
Academic year:

2020
Views:

464

Pages:

2
Author:

Busunsolfwf9z

1. An ionic solid MX(s) is added to water and it spontaneously dissolves. This means the solution … Enthalpy of solution General Chemistry 2. Is the process MX(s)  M+(g) + X−(g) exothermic or endothermic? The energy change is called the lattice energy. 0% 1. exothermic 0% 2. endothermic 0% 3. Need to know the substance MX(s). 4. Is the process MX(s)  M+(aq) + X−(aq) exothermic or endothermic? The energy change is called the enthalpy (or heat) of solution. 0% 1. exothermic 0% 2. endothermic 0% 3. Need to know the substance MX(s). 0% 0% 0% 0% 1. 2. 3. 4. get warmer gets cooler There is no temperature change Further information needed 3. Is the process M+(g) + X−(g)  M+(aq) + X−(aq) exothermic or endothermic? The energy change is called the hydration energy (or heat of hydration). 0% 1. exothermic 0% 2. endothermic 0% 3. Need to know the substance MX(s). 5. The sign of the enthalpy of solution predicts whether something dissolves … 0% 1. only for exothermic dissolving, ΔHsoln < 0. 0% 2. only for endothermic dissolving, ΔHsoln > 0. 0% 3. for neither exo‐ or endothermic dissolving. 1 6. An ionic solid is very soluble in water. This means the energy of dissolving is … 0% 0% 0% 0% 0% 1. 2. 3. 4. 5. large and positive large and negative small and positive small and negative None of the above