You should have noticed that the Styrofoam ball rolled slightly towards the rod and then appeared to be lifted abc explains why the rod was able to lift the Styrofoam ball? O magnetism O gravity O static electricity O electromagnetism

Q: styrofoam cup used instead of a beaker?

A: The molar heat of fusion is quantity of heat required to change 1g of solid to liquid without any…

Q: Part II. Data Table Al 40.90g 92.55 l00°C symbol of metal used mass of empty 8" test tube mass of…

A: Given, Symbol of metal used = Al (Aluminium) Mass of empty test tube = 40.90 g Mass of test tube and…

Q: Thermal decomposition of 5.0 metric tons of limestone to lime and carbon dioxide absorbs 9.0×106 kJ…

A: Given: Energy=9.0×106 kJ

Q: Identify the necessary parts to build a calorimeter. Select one or more: Thermometer O An exterior…

A: A calorimeter is an instrument used to measure the heat evolved or absorbed in a chemical reaction.…

Q: A piece of silver whose mass is 10.8 g is immersed in 21.9 g of water. The system is heated…

A: Mass of silver = 10.8g Change in temperature = (37.6-24)°C= 13.6°C Specific heat of silver =…

Q: All changes saved 18. Why do you cook with metal pots and pans? Metal has a low heat capacity, which…

A: Heat capacity is amount of heat required to raise the temperature of substance by one degree Celsius

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A: The two given samples are- Sample 1- 125.0 mL of CH3OH at 36°C Sample 2- 250.0 mL of CH3OH at 18°C…

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A: Since metal is a good conductor of heat due to free electrons in the metal.

Q: Calculate the electrical energy (d

A: ∆G∘ = work done by the cell ∆G∘ = - nFEocell  where n = 2 ( number of moles of electrons…

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A: In the  heating curve, we can observe that ,initially solid is heating then equilibrium is attained…

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A:

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A: A question based on tools in analytical chemistry that is to be accomplished.

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A: Energy is defined as the capacity to do work.  There are various types of energy that are present.

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A:

Q: 26. A student constructs the device shown to measure the change in temperature that occurs when two…

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A: Choping into tiny pieces is kind of mechanical work.

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A: Solid fuels are wood, charcoal, coal, dry dunk etc.

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Q: Question Completion Status A Moving to another question will save this response Question 41 Motch…

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A:

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A: Since you have posted multiple questions, we are entitled to answer the firs only.

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A: Answer

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A: The solution is given below -

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A: Since the calorific value of wood gas is approximately = 20 KJ/Kg

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Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.