Heat capacity of a substance is infinite. It means:

The heat capacity of a substance is a measure of its ability to absorb heat energy without a significant change in temperature. When the heat capacity of a substance is said to be infinite, it means that the substance can absorb or release an unlimited amount of heat energy without experiencing a change in temperature.

Explanation:

1. Heat capacity and its significance:
Heat capacity is defined as the amount of heat energy required to raise the temperature of a substance by a certain amount. It is commonly represented by the symbol "C" and is measured in units of joules per degree Celsius (J/°C) or calories per degree Celsius (cal/°C).

The heat capacity of a substance depends on various factors such as mass, composition, and specific heat capacity. It is an intrinsic property of the substance and is typically given per unit mass or per mole of the substance.

2. Infinite heat capacity:
When the heat capacity of a substance is said to be infinite, it means that the substance can absorb or release an unlimited amount of heat energy without experiencing a change in temperature. This implies that the substance has the ability to store an infinite amount of heat energy without any temperature change.

3. No change in temperature:
When the heat capacity is infinite, it indicates that the substance can absorb or release heat energy without causing a change in temperature. This is because the substance has the ability to distribute the heat energy throughout its entire mass, preventing any localized increase or decrease in temperature.

4. Examples:
Substances with infinite heat capacity are theoretical and do not exist in reality. In practice, most substances have finite heat capacities. However, substances with high heat capacities, such as water, have the ability to store a large amount of heat energy without experiencing a significant change in temperature. This property is utilized in various applications, such as using water as a coolant in engines or as a heat storage medium in heating systems.

5. Conclusion:
In conclusion, when the heat capacity of a substance is said to be infinite, it means that the substance can absorb or release an unlimited amount of heat energy without a significant change in temperature. This property is theoretical and does not exist in reality, but substances with high heat capacities can store large amounts of heat energy without experiencing a substantial change in temperature.