Does a liquid release energy or absorb energy when it changes into a solid?

Q: When 100 g of 40°C iron nails is submerged in 100 g of 20°C water, show that the final temperature…

A: Mass of nails & water = 100 g Temperature of nails= 40°C Temperature of water= 20°C

Q: How is the boiling point of water affected when some salt is added to it?

A: When salt is added to water, there is dissociation of sodium chloride into sodium and chlorine ions.…

Q: Give evidence that the density of water does not follow that of most substances, when heated.

A: Of course, density of most matter in the earth(not to say universe) depend on temperature. Water's…

Q: How does melting ice change the temperature of the surrounding air?

A: For the ice to melt, it needs to gain energy from the surrounding.

Q: A 1.06 kg metallic mass increases 4°C for every 1000 J of heat applied to it. The sample shows some…

A: Given data: The mass of metal is m=1.06 kg. Heat transfer is Q=1000 J. Change in temperature is…

Q: cool

A: Aluminium has higher specific heat capacity which means you require more heat energy to heat up a…

Q: is caused when metallic substances are heated to high temperatures.

A: The temperature increase of the metallic substance affect the substance in many ways.

Q: What are four common phases of matter?

A: A phase is a physically distinctive form of matter.

Q: two blocks of ice when placed together, combine to form a single piece. explain how this happens?

A: The melting point of ice:

Q: Would regelation occur if ice crystals did not have an open structure? Explain.

A: The structure of ice is similar to that of water molecules. There exist hydrogen bonds in ice…

Q: Chocolate candy in your hand will eventually melt as the heat from your body is released and makes…

A: This phenomenon is due to Conduction of heat. For detailed explanation see next step.

Q: Does an ice skater really water? skates on jce on on ICe Exelain

A: Melting point is depending on pressure,

Q: to heat the lead if it has a specific heat capacity of .129 J/ g°C. Answer: 9-10. A 1000 g cube of…

A: Given: The mass of cube lead is m=1000 g. The initial temperature of cube lead is T1=25°C. The final…

Q: What properties of metal make them conduct heat better than wood?

A: A metal is a good conductor of heat whereas a wood is a bad conductor of heat. Metals have more…

Q: Which of these will cause water to change to ice? O Adding salt to the water O Removing heat from…

A:

Q: The formation of ice from water is accompanied by whichof the following: (a) an absorption of heat…

A: Water can exist in solid, liquid, and in gas (vapor).

Q: A liquid which is around vaporization state is called: o Saturated liquid o Compressed liquid o…

A: In this question we have to answer what is the liquid called which is around its vaporization state.…

Q: How can water be brought to a boil without heating it?

A: Boiling is the process when liquid phase changes to the gas phase.

Q: How do the atoms of a solid move?

A: Atoms in a solid only shake back and forth in place. The reason is In the solid the particles the…

Q: What is the difference between an intensive and an extensive state of matter?

A:

Q: How does the freezing point of a liquid compare with its melting point?

A: the melting point is the temperature at whcich a substance changes from the solid phase to liquid…

Q: A 9.75-kg sample of an unknown material requires 6.14 x 105 J of heat to change from a solid to a…

A: Given : m = 9.75 kg Q = 6.14 x 105 J

Q: Give two types of conduction .

A: Conduction is broadly classified into two types : 1. Conduction of heat - When a substance is…

Q: Why are most of the solids crystalline in nature?

A:

Q: What line segment(s) do the following occur a. Is LIQUID only b. Vaporization (boiling) c. Freezing…

A: Disclaimer: As the question number is not mentioned, only question no. 18 will be solved. If you…

Q: What percentage of an iceburg is below the surface of the water?

A: As we know that:-  Density of ice=0.9gm/ml(approx) Density of water=1gm/ml

Q: Where does the heat added go during melting or boiling point?

A: When heat is supplied to a solid, (eg : ice) it starts melting. But temperature rise only up to a…

Q: How much heat (in kJ) must be added to completely transform the ice (at the melting point) to liquid…

A: Given Mass of ice = 2.0 kg Initial temperature of ice = -8 °C Final temperature of water = 0 °C We…

Q: 4. 300g of water at 50°C in a 100g glass are added to 20g of ice at 0°C. Solve for the final…

A: Given: Mass of water = 300 grams  Initial temperature of the water = 50o C Mass of ice = 20 g…

Q: Boiling is a form of evaporation - O True O False

A:

Q: Water can be sprayed easily when soap is added to it, Why?

A: Because addition of soap decreases the surface tension of water. The energy for spraying is…

Q: Why does increasing the temperature of a solid make it melt?

A: The process by which solid become liquid is known as melting. Phase changes occur when matter…

Q: Why do bubbles form inside the bottle of carbonated soda (ex. Sprite) when adequately submerged in a…

A: Why do bubbles form inside the bottle of carbonated soda (ex. Sprite) when adequately submerged in a…

Q: Phas change from a solid to a liquid. A.Is it condensation B.Is it melting C.Is it sublimation Or…

A: condensation gas changes into liquids sublimation solid into gas

Q: What is the energy needed to melt 0.55 kg of gold? (Use: Le of gold-63 kJ/kg) Select one: a. 34.65 J…

A: We are given latent heat of fusion of gold , Lf = 63 kJ/ kg This means to melt 1 Kg of gold , 63 kJ…

Q: true or false ? is Oxygen is an example of matter .

A: Matter is made from atoms. Every substance has a unique number of protons, neutrons, and electrons.…

Q: Name the metal which is liquid at room temperature?

A: In general, all the metals are in solid state at room temperature except mercury.

Q: what contains a piece of metal that bends when it gets hot

A: A breaker contains a small piece of metal that bends when it gets hot.

Q: When water freezes what happens to its molecules?

A: This question is based on thermal properties of matter topic. At high temperature, the molecules of…

Q: Discuss what the predominant gas is in a bubble of boiling water.

A:

Q: State the effect of increase of pressure on the melting point of ice?

A: The effect of pressure on the melting point of ice can be explained by le chatelier’s principle…

Q: Timber is an anisotropic material as it?

A: solution as

Q: What is the effect of increase in pressure on the boiling point of a liquid?

A: When the pressure applied to the liquid surface is increased, the energy needed for the liquid…

Q: Is iced water a pure substance? Why?

A:

Q: Why is the energy is required to melt a solid?

A: Particles in solid are connected to each other by strong bonds and cannot move freely as in liquid…

Q: Differentiate between Stretching and Compressing of materials?

A: Stretching : Stretching means pulling of an object. In physics, stretching refers to pulling of an…

Q: Show that 60.0 L of gasoline originally at 15.0oC will expand to 61.1 L when it warms to 35.0oC.

A: Initial Volume (Vi) = 60 L Final volume (Vf) = 61.1 L Rise in Temperature (∆T)= 35 - 15 °C…