States of Matter

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In a condensation reaction, two reactants react to form water or ammonia and one other byproduct. As long as either water or ammonia is formed and is the only byproduct, a reaction is considered a condensation reaction. A condensation reaction is not to be confused with the process called condensation, where water vapor turns to liquid after losing heat.

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  • What Is the Temperature of Ice?

    Q: What Is the Temperature of Ice?

    A: Chemists at the University of Utah discovered that ice forms at temperatures as low as minus 55 degrees Fahrenheit, according to a Science Daily article. Prior to this discovery, scientists believed ice formed exclusively at 32 degrees Fahrenheit.
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  • At What Temperature Does Wood Catch Fire?

    Q: At What Temperature Does Wood Catch Fire?

    A: Dry wood catches fire between about 300 degrees Fahrenheit and 580 degrees Fahrenheit, depending upon the species of wood and the extent of decay present, with more decayed wood being quicker to ignite. The amount of moisture in the wood is the strongest influence on wood reaching this temperature.
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  • Why Do Solids Have Definite Shapes and Volumes?

    Q: Why Do Solids Have Definite Shapes and Volumes?

    A: Solids have definite shapes and volumes because their atoms and molecules are held together firmly by the strong inter-molecular forces. At low temperatures, the kinetic energy in the solid is usually not enough to overcome these intermolecular forces, so the solid remains in the same state.
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  • How Long Does Water Take to Freeze in a Freezer?

    Q: How Long Does Water Take to Freeze in a Freezer?

    A: The time it takes for water to freeze in a typical freezer varies depending on a number of factors. The first factor to consider is the amount of water being frozen.
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  • At What Celsius Temperature Does Water Freeze?

    Q: At What Celsius Temperature Does Water Freeze?

    A: Water freezes at zero degrees Celsius under normal conditions. The freezing point is the temperature at which a liquid becomes a solid, according to About.com. The Celsius scale is the official temperature scale for most of the world, although the United States still uses the Fahrenheit scale.
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  • What Is the Melting Point of Mild Steel?

    Q: What Is the Melting Point of Mild Steel?

    A: The melting point of mild steel, or low carbon steel, is usually 2,600 degrees Fahrenheit, or 1,427 degrees Celsius. Mild steel is one of the most commonly used types of industrial steel, and it consists of an alloy of steel and carbon.
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  • What Is the Boiling Point of Sugar?

    Q: What Is the Boiling Point of Sugar?

    A: Sugar does not have an exact boiling point by itself as sugar does not melt or boil, but decomposes. There are boiling points when sugar is dissolved in water. However, those are not static numbers.
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  • What Are Some General Properties of Matter?

    Q: What Are Some General Properties of Matter?

    A: Properties of matter, defined by Education Portal, are divided into two groups: physical properties that include color, density, mass, boiling point, volume, solubility, malleability and temperature; and chemical properties that include reactivity with oxygen, reactivity with water, flammability, pH, toxicity and combustion. Physical properties of matter can be observed or measured without changing the composition, while chemical properties can only be observed after a chemical change has occurred.
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  • How Does Matter Change From One State to Another?

    Q: How Does Matter Change From One State to Another?

    A: An element's state changes depending on its temperature and the pressure exerted on it. Heating or cooling an element can cause it to change states. Adding or removing pressure can do so as well.
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  • What Are Some Examples of Matter?

    Q: What Are Some Examples of Matter?

    A: All physical objects, such as stars, books, people, animals, plants and the sea, are examples of matter. Matter is any physical object that occupies space and has mass.
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  • Why Can Gases Be Compressed?

    Q: Why Can Gases Be Compressed?

    A: Gases can be compressed because each gas particle has relatively vast amounts of room between it and all other gas particles the majority of the time. Thus, compression, which is essentially forcing the gas particles closer together, has a great deal of space to reduce. This contrasts with liquids and solids, which have particles in constant contact with one another, and thus little room to compress.
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  • In What Two Ways Is Heat Involved in Chemical Change?

    Q: In What Two Ways Is Heat Involved in Chemical Change?

    A: Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place. Both of these two mechanisms of chemical change involve the heat characteristics of the involved substance or substances and the environment in which the chemical change is taking place.
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  • What Is the Melting Point of Rubber?

    Q: What Is the Melting Point of Rubber?

    A: Rubber begins to melt at approximately 180 degrees Celsius. At low temperatures, around 5 C to 6 C, there is a risk that rubber hardens because of crystallization. The optimum temperature for rubber is 20 C.
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  • What Is the Fifth State of Matter?

    Q: What Is the Fifth State of Matter?

    A: The fifth state of matter is Bose-Einstein condensation, which is a gaseous superfluid formed by atoms that have been cooled to almost absolute zero. The theory was proposed by Satyndra Bose and Albert Einstein in the 1920s.
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  • How Long Does It Take to Freeze a Gallon of Water?

    Q: How Long Does It Take to Freeze a Gallon of Water?

    A: The time it takes to freeze a gallon of water varies from minutes to several hours. The time it takes is based on several factors including temperature and the pureness of the water.
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  • How Does Gas Become a Liquid?

    Q: How Does Gas Become a Liquid?

    A: The process of a gas changing to a liquid is called condensation, and for condensation to take place, the environment has to reach maximum vapor pressure, generally through a lowering of temperature in the case of the water cycle. Because pressure varies inversely with temperature, as temperature decreases, pressure goes up, causing the gas molecules to move with progressively less kinetic energy. Eventually, liquid vapor and droplets form, and the gas begins to condense.
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  • At What Temperature Does Gasoline Burn?

    Q: At What Temperature Does Gasoline Burn?

    A: Gasoline burns at 495 degrees Fahrenheit at standard atmospheric pressure. This ignition temperature is the lowest temperature at which gasoline may undergo combustion. If the temperature is lower than this, a fire is needed to ignite gasoline. If too little air is present, a higher temperature is needed.
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  • What Is the Density of Oil?

    Q: What Is the Density of Oil?

    A: The density of oil depends on the type of oil and varies between 0.8 to 0.96 grams per centimeter cubed. Fuel oil is commonly used in engines and industrial furnaces. It is also called heating oil and has a density of 0.81 grams per centimeter cubed.
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  • Is Aluminum a Solid, Liquid or Gas?

    Q: Is Aluminum a Solid, Liquid or Gas?

    A: The physical state of aluminum is dependant on the temperature. This metal exists as a solid at temperatures below its melting point of 1220.58 degrees Fahrenheit, at which it becomes a liquid. At temperatures above 4566 Degrees Fahrenheit, aluminum becomes a gas.
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  • How Does Temperature Affect the Rate of Evaporation?

    Q: How Does Temperature Affect the Rate of Evaporation?

    A: Increased temperatures accelerate the rate of evaporation, while decreased temperatures slow down the process. First of all, heating of the liquid energizes the molecules, allowing them to escape and move into the air. Second, heat in the nearby atmosphere increases evaporation because warmer air is able to hold more water vapor.
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  • Does Ice Weigh More Than Water?

    Q: Does Ice Weigh More Than Water?

    A: In general, if ice and water have the same volume, then the ice weighs less. This is because ice is less dense than water and occupies more space. Therefore, a gallon of ice weighs less than a gallon of water.
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