Volume Change
Volume Change - Related Videos
01:17
Work Done During Volume Change
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2023
In mechanics, work is done on an object when the force acting on it displaces the object. In thermodynamics, work done on a system can be estimated when the system's volume changes during any thermodynamic process. Consider a gas confined to a cylinder fitted with a movable piston at one end. If the gas expands from volume V1 to volume V2, it exerts a force on the piston, such that the piston moves by a distance dr. The work done by the gas on the piston can be expressed as If p is the...
01:26
Unsoundness of Aggregate due to Volume Change
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2024
Unsoundness in aggregates due to volume changes is primarily caused by the physical alterations aggregates undergo, such as freezing and thawing, thermal changes, and wetting and drying. Unsound aggregates, when subjected to these changes, result in volume change upon disintegration. This, in turn, contributes to the deterioration of concrete, including scaling, pop-outs, and cracking. Particular types of aggregates, such as porous flints, cherts, and those containing clay minerals, are...
02:32
Le Chatelier's Principle: Changing Volume (Pressure)
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2020
For gas-phase equilibria, changes in the concentrations of reactants and products can occur with altered volume and pressure. The partial pressure, P, of an ideal gas is proportional to its molar concentration, M. So changes in the partial pressures of any reactant or product are essentially changes in concentrations; therefore, these changes yield the same effects on equilibria. Aside from adding or removing reactants or products, the pressures (concentrations) of species in a gas-phase...
08:14
Climate Change - Student Protocol
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2019
Melting Land and Sea Ice ExpandNOTE: This activity is a simulation of land- and sea-ice melting and their effects on water levels. First, label one graduated cylinder as 'Sea Ice' and the other graduated cylinder as 'Land Ice.' Hypotheses: the experimental hypothesis might be that the land ice melting will cause the water level to rise more than the melting sea ice. The null hypothesis would be that there will be no difference in the change in water level between the two containers. Add 10 ice...
04:34
Climate Change - Concepts
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2019
The certainty of climate change remains a public controversy despite the consensus among approximately 97% of active climate researchers, who not only agree that the Earth’s climate is changing but also state that this change is intensified by human activity, predominantly carbon emissions 1. The disconnect between the public and the experts is partly due to poor understanding of the mechanisms involved in climate change as well as the differences among essential concepts such as weather and...
FAQs
Temperature changes alter the spacing between particles. Heating can increase occupied space as particles separate, while cooling can reduce it. The effect helps explain thermal expansion and provides a way to characterize how gases and liquids respond to changing conditions. In chemical systems, recognizing this response is important when interpreting measurements or designing containers for temperature variations.
Pressure changes can modify particle spacing, with gases generally showing especially important volume responses. Increasing or decreasing pressure therefore changes the space occupied by the material and influences gas behavior. Chemists account for this relationship when analyzing systems under different conditions, comparing measurements, or interpreting how a container responds as pressure varies.
A phase transition can reorganize particles and change their spacing, so the occupied volume may differ between phases. Intermolecular interactions also affect how closely particles pack together. These effects help explain volume differences during phase transitions and provide chemical context for interpreting physical transformations in gases, liquids, and other changing systems.
Tracking the increase or decrease in occupied space provides information about how a substance responds to temperature, pressure, phase transitions, or mixing. Measurements can therefore help characterize gases, liquids, and solutions rather than serving only as a container reading. Comparing volume before and after a change also supports interpretation of the underlying physical transformation.
In a closed system, observing volume change helps researchers follow thermal expansion and other physical transformations while the material remains contained. The measurements can reveal how the system responds to changing conditions and support safer, more appropriate container and equipment design. This approach is especially relevant when expansion could affect available space or system operation.
Volume relationships connect measurements with density, concentration, and gas behavior. During solution preparation, volume helps establish the intended composition, while comparisons involving mass and volume support density calculations. In gas studies, volume measurements help interpret changes in behavior under altered conditions. These relationships make volume data useful for both laboratory preparation and chemical analysis.