Question

Bomb calories are often used to determine the amount of energy stored in foods. You can find the molar enthalpy of combustion for sucrose (table sugar) by looking it up on a table. Why can't you do the same with butter? Use your knowledge of these types of matter (not the information provided in this article) to answer your question.

a) Butter contains a different type of chemical bond
b) Butter has a variable composition
c) The composition of butter varies with the brand
d) Butter undergoes a different type of combustion reaction

Answer 1

Butter contains a different type of chemical bond than sucrose (table sugar), which results in different combustion reactions and heat released. Therefore, the molar enthalpy of combustion for butter cannot be determined by looking it up on a table. Option a

Step-by-step explanation:

The reason why you can't find the molar enthalpy of combustion for butter by looking it up on a table is because butter contains a different type of chemical bond. Butter is a mixture of different types of fats, including saturated and unsaturated fats, which have different chemical structures and bonds compared to sucrose (table sugar).

The combustion reactions for sucrose and butter are different, resulting in different amounts of heat released. Therefore, the molar enthalpy of combustion for butter cannot be determined by simply looking it up on a table. Option a