One Statement of the First Law of Thermodynamics Is That

question 18

Multiple Choice

One statement of the first law of thermodynamics is that

• A) the amount of work done on a system is dependent of the pathway.
• B) the total work done on a system must equal the heat absorbed by the system.
• C) the total work done on a system is equal in magnitude,but opposite in sign of the heat absorbed by the system.
• D) the total energy change for a system is equal to the sum of the heat transferred to or from the system and the work done by or on the system.
• E) in any chemical process the heat flow must equal the change in enthalpy.

---

Definitions:

α-Helix

A common helical structure found in proteins, characterized by a right-handed coil where each amino acid residue correlates with a 100-degree turn in the helix.

Beta-Pleated Sheet

A common motif of secondary structure in proteins characterized by beta strands connected laterally by at least two or three backbone hydrogen bonds, forming a generally twisted, pleated sheet.

Globin

A group of proteins that form part of the structure of hemoglobin, responsible for oxygen transport in the blood.

Peptide Bonds

Chemical bonds formed between amino acids during protein synthesis, linking the carboxyl group of one amino acid to the amino group of another, releasing water.