A 100-ML Sample of Water Is Placed in a Coffee $\Delta$

question 35

Multiple Choice

A 100-mL sample of water is placed in a coffee cup calorimeter.When 1.0 g of an ionic solid is added,the temperature decreases from 21.5°C to 20.8°C as the solid dissolves.For the dissolving of the solid

• A) (\(\Delta\)H) < 0
• B) (\(\Delta\)S)(universe)> 0
• C) (\(\Delta\)S)(system)< 0
• D) (\(\Delta\)S)(surroundings)> 0
• E) none of these

---

Definitions:

Oocyte

A female germ cell involved in reproduction; an immature ovum (egg cell).

Sperm

The male reproductive cells or gametes involved in sexual reproduction, capable of fertilizing an ovum to produce offspring.

Fertilization

The process by which a sperm cell unites with an egg cell to form a zygote, initiating the development of a new organism.

Relaxin

A hormone produced by the placenta in the later months of pregnancy that increases flexibility in the ligaments and joints of the pelvic area. In men, relaxin is contained in semen, where it assists in sperm motility.