Formation of carbon disulphide from carbon and sulphur takes place by

Options

A. absorption of heat
B. evolution of heat
C. no change in heat content
D. none of the above.

Explanation

To determine the type of reaction that occurs during the formation of carbon disulfide (CS2) from carbon (C) and sulfur (S), we can follow these steps:

### Step 1: Write the Chemical Equation
The first step is to write the balanced chemical equation for the reaction. The formation of carbon disulfide from carbon and sulfur can be represented as:

\[ \text{C} + 2\text{S} \rightarrow \text{CS}_2 \]

### Step 2: Identify the Type of Reaction
Next, we need to identify the type of reaction. In this case, we are looking at a combination reaction where two or more reactants combine to form a single product.

### Step 3: Determine Heat Changes
To classify the reaction further, we need to examine the heat changes involved. The reaction of carbon with sulfur to form carbon disulfide is known to absorb heat. This means that the reaction requires energy input to proceed.

### Step 4: Classify the Reaction as Endothermic
Since the reaction absorbs heat, we classify it as an endothermic reaction. An endothermic reaction is characterized by the absorption of heat from the surroundings.

### Step 5: Quantify the Energy Change
In this specific reaction, it is noted that approximately 92 kJ of energy is absorbed during the formation of carbon disulfide. This quantifies the energy change associated with the reaction.

### Conclusion
Therefore, the formation of carbon disulfide from carbon and sulfur is an endothermic reaction, as it requires the absorption of heat.

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