Heat produced in calories by the combustion of one gram of carbon is called

Options

A. Heat of combustion of carbon
B. Heat of formation of carbon
C. Calorific value of carbon
D. Heat of production of carbon.

Explanation

To answer the question, "Heat produced in calories by the combustion of one gram of carbon is called," we can follow these steps:

### Step 1: Understand the Concept of Combustion
Combustion is a chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat. In this case, we are focusing on the combustion of carbon.

**Hint:** Remember that combustion reactions typically release heat and are exothermic processes.

### Step 2: Identify the Measurement of Heat
The heat produced during combustion is measured in calories. When we talk about the heat produced by burning a specific amount of a substance, we often refer to it in terms of a specific quantity, such as one gram.

**Hint:** Consider how heat is quantified in chemical reactions and the units used for measurement.

### Step 3: Define the Term for Heat Produced
The heat produced by the combustion of one gram of a substance, such as carbon, is specifically referred to as its "calorific value." This term indicates the amount of energy released when a specific mass of the substance is burned.

**Hint:** Think about terms that relate to energy release in combustion and how they are defined in chemistry.

### Step 4: Clarify Related Terms
While "calorific value" is the correct term for the heat produced by the combustion of one gram of carbon, it's important to differentiate it from other terms:
- **Heat of combustion** refers to the heat released when one mole of a substance is burned.
- **Heat of formation** refers to the heat required to form one mole of a substance from its elements.

**Hint:** Be aware of the distinctions between calorific value, heat of combustion, and heat of formation.

### Final Answer
The heat produced in calories by the combustion of one gram of carbon is called the **calorific value of carbon**.