A 60,000 ft2 building used 850,000 kWh of electricity and 900 Mcf of natural gas over the past 12 months. What is the Energy Use Index of the building? (Assume 1 Mcf= 1,037,000 Btu) a. 63.9 kBtu/ft2 b. 68.2 kBtu/ft2 c. 73.6 kBtu/ft2 d. 79.4 kBtu/ft2

A 60,000 ft2 building used 850,000 kWh of electricity and 900 Mcf of natural gas over the past 12 months. What is the Energy Use Index of the building? (Assume 1 Mcf= 1,037,000 Btu) a. 63.9 kBtu/ft2 b. 68.2 kBtu/ft2 c. 73.6 kBtu/ft2 d. 79.4 kBtu/ft2

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 19RQ: What are the two types of energy most frequently used or considered in this industry?

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Concept explainers

Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.

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