The Critical Point of Hydrogen Sulifide, H₂S, Occurs at a Pressure

question 10

Multiple Choice

The critical point of hydrogen sulifide, H₂S, occurs at a pressure of 9.01 MPa, volume of 97.9 m³ mol^-1 and temperature of 374 K. Calculate the values of the van der Waals parameters a and b.

• A) a = 12.7 MPa m⁶ mol^-2 and b = 12.5 m³ mol^-1
• B) a = 89.2 MPa m⁶ mol^-2 and b = 32.6 m³ mol^-1
• C) a = 36.2 MPa m⁶ mol^-2 and b = 92.9 m³ mol^-1
• D) a = 57.1 MPa m⁶ mol^-2 and b = 90.1 m³ mol^-1

---

Definitions:

Batch-level Activity

Activities and costs that are incurred whenever a batch of goods is produced, regardless of the size of the batch.

Activity Cost Pool

A grouping of all the costs related to a particular activity in the activity-based costing method.

Activity Rate

An overhead rate in activity-based costing. Each activity cost pool has its own activity rate which is used to assign overhead to products and services.

Purchasing Department

A division within an organization responsible for acquiring goods, services, and materials necessary for its operations.