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05/12/2022 10:26 AM

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Biology Objective Questions On Different Branches🟢Cell Biology Objective Questions (कोशिका एवं कोशिका विभाजन का वस्तुनिष्ठ प्रश्न)🟢Objective Questions and Answers: Animal Tissue(जन्तु ऊतक) 🟢Objective Questions and Answers Digestive system(पाचन-तंत्र) 🟢Objective Questions and Answers Human Blood (मानव रक्त) Part-1🟢Objective Questions and Answers Human Heart (मानव हृदय) 🟢Objective Questions and Answers Excretion system (उत्सर्जन तंत्र) 🟢Objective Questions and Answers Nervous system (तंत्रिका तंत्र) 🟢Objective Questions and Answers Skeleton system (कंकाल तंत्र)🟢 Objective Questions and Answers Endocrine system (अंतःस्रावी तंत्र)🟢Objective Questions on Mineral Resources of India and World (भारत और विश्व के खनिज संसाधन)🟢MCQ On Energy Resources (ऊर्जा संसाधन वस्तुनिष्ठ प्रश्न)🟢Objective Question on Industry of India (भारत के उद्योग)🟢Objective Question on Multipurpose Projects of India (भारत के बहुउद्देशीय परियोजना)🟢Objective Question on Rivers of India (भारत की नदियाँ)🟢Objective Question on National Park and Wildlife Sanctuary in India(राष्ट्रीय उद्यान तथा वन्य जीव अभयारण्य)🟢Objective Questions on Soils of India (भारत की मिट्टियाँ)🟢Objective Questions on Agriculture of India (भारत की कृषि)🟢Objective Questions on Indian Mountains and World Mountains (भारतीय पर्वत और विश्व के पर्वत)🟢Objective Questions on Natural Vegetation of India and World

“The Knowledge Library”

Knowledge for All, without Barriers…

 

An Initiative by: Kausik Chakraborty.
Biology Objective Questions On Different Branches🟢Cell Biology Objective Questions (कोशिका एवं कोशिका विभाजन का वस्तुनिष्ठ प्रश्न)🟢Objective Questions and Answers: Animal Tissue(जन्तु ऊतक) 🟢Objective Questions and Answers Digestive system(पाचन-तंत्र) 🟢Objective Questions and Answers Human Blood (मानव रक्त) Part-1🟢Objective Questions and Answers Human Heart (मानव हृदय) 🟢Objective Questions and Answers Excretion system (उत्सर्जन तंत्र) 🟢Objective Questions and Answers Nervous system (तंत्रिका तंत्र) 🟢Objective Questions and Answers Skeleton system (कंकाल तंत्र)🟢 Objective Questions and Answers Endocrine system (अंतःस्रावी तंत्र)🟢Objective Questions on Mineral Resources of India and World (भारत और विश्व के खनिज संसाधन)🟢MCQ On Energy Resources (ऊर्जा संसाधन वस्तुनिष्ठ प्रश्न)🟢Objective Question on Industry of India (भारत के उद्योग)🟢Objective Question on Multipurpose Projects of India (भारत के बहुउद्देशीय परियोजना)🟢Objective Question on Rivers of India (भारत की नदियाँ)🟢Objective Question on National Park and Wildlife Sanctuary in India(राष्ट्रीय उद्यान तथा वन्य जीव अभयारण्य)🟢Objective Questions on Soils of India (भारत की मिट्टियाँ)🟢Objective Questions on Agriculture of India (भारत की कृषि)🟢Objective Questions on Indian Mountains and World Mountains (भारतीय पर्वत और विश्व के पर्वत)🟢Objective Questions on Natural Vegetation of India and World

“The Knowledge Library”

Knowledge for All, without Barriers……….
An Initiative by: Kausik Chakraborty.

The Knowledge Library

Melting Point of Aluminum

Melting aluminum is an imperative part of the recycling process.

What is the Melting Point of Aluminum?

The melting point of a substance is defined as the temperature at which the substance changes from a solid to a liquid state but at a specific atmospheric pressure. It is at the melting point that a substance’s liquid and solid states exist in equilibrium. However, a substance’s melting point mainly depends on pressure; it is often specific at a standard pressure in reference materials. A substance’s melting point is also referred to as liquidus, liquefaction point, or solidus. The melting point of aluminum is 659 degrees Celsius or 1218 Fahrenheit.

What is the Purpose of Determining the Melting Point of a Substance?

A substance’s melting point is an essential physical property. The main aim of determining the boiling points and melting points of substances during a lab experiment is to use the results to help identify impurities in those substances or unknown substances. An unknown solid’s melting point can be used to identify it by comparing it to a variety of other potential solids and their melting points thus making a match to identify the solid. Additionally, the purpose of knowing a substance’s melting point is to use its melting point range to help determine its general purity. In this regard, the bigger the melting range of substance then the less pure the substance is while the more the melting point range decreases, the purer the substance.

Factors Affecting the Melting Point of Substances

The melting point of a substance varies from one substance to another. For instance, while oxygen melts at 218 degrees Celsius, ice melts at 0 degrees Celsius and aluminum is 219 degrees Celsius. Therefore, certain things affect the melting points of different substances. Factors affecting the melting point of substances include intermolecular forces, ionic bonds melting point variations, the shape of molecules and size of molecules. A pure compound that is crystalline usually has a more precise melting point thus completely melts over a small range of temperature not exceeding 0.5-1 degrees Celsius. If such a substance contains even the slightest amount of impurities, depression is usually produced in the freezing points showing an increase in the width of the melting point range.If a melting point range is over five degrees, then it means that the substance is impure.

The Uses of Aluminum

Aluminum is one the world’s most useful metals. In its pure form, aluminum is primarily used by the electronics industry to make hard disk drives, conductor tracks on silicon chips, and capacitor foil. When the metal is alloyed with other metals such as silicon, zinc, copper, and magnesium, it becomes even stronger. Another significant use of aluminum is in the manufacturing of beverage cans and the foil used in protecting food and a variety of cooking utensils.

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