A metal door opens more easily when it colder outside. The reason for this is that , as the metal cools the atoms

Q: The main reason that distillation is a costly method for purifying water is the high energy required…

A: Distillation is the process in which the components of a mixture are separated on basis of different…

Q: Aluminum metal is a solid at room temperature. When heated, it can turn into liquid, then gas at the…

A: According to the question, The mass of the aluminum is given by = 42.0 gram The initial temperature…

Q: (a) If 83.0 g of ice at 0.0oC is placed in 235mL of water at 28.0oC, find the final temperature of…

A:

Q: Given that a 10.0 g sample of ice at 0.0 °C melts and then the resultant water proceeds to warm to…

A:

Q: Calculate the amount of energy that is lost when 175 grams of water vapor cools from 120oC to 101oC.

A: Given: Mass of water, m =175 g The specific heat capacity of water = 4.184 J/goC The change in…

Q: The sum of the heats of fusion and vaporization of that substance at the same temperature. A. Heat…

A: Heat is a form of energy which can be transferred between any substances or systems which are…

Q: What amount of heat energy is needed to warm 4.00 grams of H2O (ℓ) by 25°C?

A: Specific heat is the amount of heat energy required to raise the temperature of substance by 1°C ,…

Q: access the section in your e Text. Part A Suppose that 1.05 g of rubbing alcohol (C, Hs O)…

A:

Q: Fifty grams of H2O is cooled 75C to 50degreeC. 1. what is the amount of heat involved in this…

A: Given that:                                Mass of water = 50 g                Initial temperature…

Q: How many KILOJOULES of heat is required to raise the temperature of the entire 1.0 Kilogram of steam…

A: The amount of heat is required to raise the temperature of the entire 1.0 Kilogram of steam to 110…

Q: If 1.4g of 100.0C steam begins to condense on a container of liqu'd water at 25.0C and they…

A: Steam that condenses in liquid water, from which, the mass of liquid water is to be determined.

Q: What is the result of heating copper metal at high temperature?

A: Copper is a reactive element and undergo oxidation reaction when heated to high temperature.

Q: The actual value for the heat of fusion of ice is 6.02 kJ/mol. If the experimental value that was…

A: The two possible reasons are  1) The ice cube would be dry . For accuracy the ice should be wet .

Q: A sample of C₃H₄Br₂ has a normal boiling temperature of 131.5 °C. The enthalpy of vaporization for…

A: The heat required to change the temperature form T1= 97.5 °C…

Q: During a phase change, the temperature remains constant although heat is being added. What is the…

A: We give energy to the reactant in the reaction

Q: If 42.15 grams of ice at 0 deg * C was placed in 450 grams of water at 24.2 deg * C and after a…

A: As per the law of conservation of energy, the heat lost by water is equal to the heat gained by Ice.…

Q: There are three sets of sketches below, showing the same pure molecular compound (hydrogen chloride,…

A: Given Molecule : HClMelting point of HCl = -114.8 oCBoiling point of HCl = -85.1 oCThree Temperature…

Q: Which of the following statements is true? Specific heat capacity is dependent on the amount of the…

A:

Q: Given 352 mL of water at 26 °C in a perfectly heat-insulating container, how much ice at 0 °C (in…

A: M

Q: Standard enthalpy of fusion of silver at 1234K is 11.30 kJ/mol. How much energy (kJ) is required to…

A: Moles=91107.8682=0.843 mol

Q: The enthalpy of fusion of Na is 2 kJ/mol.  The enthalpy of vaporization of Na is 98 kJ/mol.…

A: Since the metal is converted from gas to solid  And since 2 moles of Na is being converted in the…

Q: A 34.30 g sample of solid lead is initially at 314.00°C. If the sample is heated at constant…

A: Heat flow from high temperature to low temperature. Use formula q= mc(T2-T1)

Q: . Explain why rubbing alcohol, which has been warmed to your body emperature still feels cooled when…

A: Rubbing alcohol is isopropyl alcohol and when it is rubbed to the body, it feels cold on skin even…

Q: What is the term for amount of energy required to raise one gram of any substance one degree on the…

A: Specific heat capacity is the term for amount of energy required to raise the heat content of a  one…

Q: A 43.70 g sample of solid magnesium is initially at 632.00°C. If the sample is heated at constant…

A: Required information: Specific heat capacity of Mg = 1.020Jg°C Formula used:…

Q: 6. Heat that causes change in temperature without a change in phase. 7. Heat that causes change in…

A: 6. Heat that causes change in temperature without a change in phase is known as Sensible heat In…

Q: 500 J of heat energy was absorbed from the sorroundings and the gas expanded from 30 L to 70 L…

A: According to the first law of thermodynamics, the energy of the universe remains constant. For a…

Q: latent heat of fusion, why the amount of ice you have will have an impact on the measured latent…

A: Calorimetry is a process of measuring changes in state variable of a body for a purpose of deriving…

Q: How much heat is absorbed when 34.5 g of H2O (MM = 18.02 g/mol) at -7.00°C is heated to 16.0°C?…

A: Correct option: 14.3 kJ

Q: How much energy in units of J, is required to heat 71.7g of solid acetone from -156.3°C to -96.6°C.…

A:

Q: 12. Conversions: a. 137°C = B. 93 K = C. 23°C = K °C (Write the equation showing this relationship)…

A: Kelvin = 273.15 + °C

Q: Determine the heat in joules to melt 52.75 moles of water given the heat of fusion is 6010 J/mol?

A: Heat of fusion is the amount of energy required for melting a given mass at its melting point…

Q: Calculate the amount of heat required to raise the tempature of an 91 g sample of water from 39C to…

A: Given: Specific heat of water = 4.18 J/g⋅∘C. Mass of water = 91 g. Initial temperature (T1) = 39 ∘C…

Q: How much heat energy is required to convert 40.7 g40.7 g of solid iron at 25 ∘C25 ∘C to liquid iron…

A: Principle: The following relation can define heat absorbed by a substance. Q=mC∆T where  m-mass of…

Q: Under normal atmospheric pressure, nitrogen boils (and condenses) at -196°C. When 7.7 g of nitrogen…

A: The amount of heat lost by the metal is equal to the amount of heat gained by the water. Formula…

Q: Calculate the final temperature of a mixture of 130.0  g of ice initially at -15.50 °C and 337.0  g…

A: The heat gained by the ice to its melting point is calculated as: Here, C = Specific heat Capacity…

Q: Evaporation of sweat requires energy and thus take excess heat away from the body. Some of the water…

A: Below attached file showing the details answer All the best

Q: 1. Consider the following situation: "A ocean breeze blows over cold ground at night, and fog…

A: A bond is a strong or weak attraction between two atoms in the same environment. The new grouping…

Q: How much heat is required to change 600. g of liquid mercury to gaseous merouty at the boiling?

A: To calculate the heat required to change the liquid mercury to gaseous mercury at its boiling…

Q: . How much heat must be removed from 15.5 g of water at 90.0°C to cool it to 43.2

A: q=m.c.∆T q= heat  m=mass C.=heat capacity ∆T= difference in temperature

Q: A sample of C₃H₄Br₂ has a normal boiling temperature of 131.5 °C. The enthalpy of vaporization for…

A:

Q: Under normal atmospheric pressure, nitrogen boils (and condenses) at -196oC. When 7.7 g of nitrogen…

A:

Q: What is the energy change

A:

Q: How much energy is required to heat 17.1 g acetone (MM = 58.08 g/mol) from a solid at -114.0°C to a…

A: To calculate the total energy required, we need to consider the energy required for each step of the…

Q: During a phase change, the temperature remains constant although heat is still being added. What is…

A: THe answer to the following question is-

Q: As a metal such as lead melts, what happens to (a) theaverage kinetic energy of the atoms and (b)…

A: a) As a metal such as lead melts, the average kinetic energy of the atoms increases. As the…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.