When 185 G of HgO(s) Is Decomposed to Form Hg(l) and and O₂(g)

question 27

Multiple Choice

When 18.5 g of HgO(s) is decomposed to form Hg(l) and O₂(g) , 7.75 kJ of heat is absorbed at standard-state conditions. What is the standard enthalpy of formation ( $\Delta$ H ^$\circ$ _f) of HgO(s)

• A) -90.7 kJ/mol
• B) -7.75 kJ/mol
• C) 0.419 kJ/mol
• D) 27.9 kJ/mol
• E) 143 kJ/mol

---

Definitions:

Pie Chart

A graphical representation of data that divides a whole into slices to illustrate numerical proportion.

Total Percentages

The sum of all percentage values in a given data set, which should ideally equal 100% if they are exhaustive and mutually exclusive categories.

Pie Chart

A circular statistical graphic divided into slices to illustrate numerical proportion, where the arc length of each slice is proportional to the quantity it represents.

Bar Chart

A graphical representation of data where the values are depicted by the length of bars.