Capacity is the ability to store or hold a substance, either in physical or chemical terms. It is also used to describe the ability of an object or system to absorb energy from another object or system. In both cases, capacity is a measure of how much can be stored or absorbed.
The term capacity can be used in many different ways. For example, it can refer to the amount of space that something takes up. This is its physical capacity. The term can also describe how much of a substance can be held by something. This is its chemical capacity. Additionally, capacity can refer to how much energy an object or system can absorb from another object or system. This is known as its heat capacity
In general, objects and systems have both a physical and chemical capacity. Physicalcapacity refers to the amount of space that an object or system occupies, while chemicalcapacity refers to the amount of substance that an object or systemcan hold. Objects and systems may also have other capacities, such as heat capacityor electrical capacitance
Capacity may be measured in many different units depending on what typeof substance is being considered and what property of the substanceis being measured
For example, measuringthe physical quantityof length mightbe donein metersor centimeterswhile measuringthe physical quantityof mass mightbe donein kilogramsor grams Similarly,measuringthe chemical quantityof aciditymightbe donein molesor equivalentswhile measuringthechemical quantityof radioactivitymightbedonein becquerelsor curies When talkingaboutenergy absorptionby an objectorgansystemits thermalcapacitywhichis usuallyexpressedin joulesper kelvinto Celsius degreechange