What point on the heating curve represents the boiling point of substance X? ___

Q: 3. Fill in the blanks on the heating curve of water below with states of matter and then identify…

A:

Q: It is observed that 1.51 kcal of energy are released when a 21.7 g sample of an unknown liquid…

A: We know that   q = m·ΔHv in which q = heat energy, m = mass, and ΔHv = heat of vaporization Given…

Q: 4. Freezing/ Solidifying 5. Melting/ Liquefying 6. Boiling point

A: In heating / cooling curve each region specify different phenomenon required in heating .…

Q: 1. intermolecular or intramolecular? 2.  intermolecular or intramolecular? 3. a) vaporization/…

A: 1. Answer - intermolecular force   2. Answer - intramolecular force

Q: Rank the compounds in Figure 27 from highest to lowest boiling point. *       D > C > B > A       C…

A: Boiling point of amines are in order: Primary amine > secondary amine > tertiary amine

Q: 56. This statement is correct regarding the relationship of vapor pressure with boiling point. *

A: Two multiple choice questions are given here.  The first question deals with the relation of boiling…

Q: 30.0 kg of steam at 115°C is cooled down until it becomes ice at -15°C. How many kilojoules of heat…

A: The amount of heat required to increase the temperature of one kilogram of a substance by one degree…

Q: Define Boiling point?

A: There are mainly three states of matter known as solid, liquid, and gases. The conversion of a solid…

Q: The heat of vaporization for water is 540 cal/g.  How many kilocalories are needed to change 5 g of…

A: Heat capacity is defined as the ratio of heat energy absorbed by a substance to the temperature…

Q: A student prepared the graph shown based on the vapor pressure of a liquid over a range of…

A: Since the graph is not shown and the equation is not represented properly, thus considering it to be…

Q: How much energy does it take to turn 10g of liquid water into a gas at the boiling point? Heat of…

A: Given data : Mass (m) = 10 g Heat of vaporization (ΔHvap ) = 540 cal/g

Q: A certain substance A has a boiling point of 78 degrees celsius and substance B has a billing point…

A:

Q: How much energy needs to be removed to turn 10g of water vapor into a liquid at the condensation…

A: Answer: amount of energy need to be remove is - 5400 cal or - 22593.6 Joule. (-) Negative sign…

Q: What happens to these physical properties as the strength of intermolecular forces increases? Drag…

A: A question based on intermolecular force of attraction, which is to be accomplished.

Q: в

A: What is the correct order of boiling point = ? Given amines are : a). D > C > B > A…

Q: The temperature on a sample of pure X held at 17.0 atm and - 68. °C is increased until the sample…

A: We are given a phase diagram

Q: What is the process of the cooling curve of Naphthalene from 90 degrees to 55 degrees? tips (cool to…

A: According to the laws of thermodynamics, the process of freezing/melting or boiling takes place at…

Q: When heating liquids in a test tube, why is the test tube moved back and forth across the flame?

A: ∙ When we heat the liquids in a test tube, we moved the test tube     back and forth across the…

Q: How much heat energy was lost by the liquid ethanol? How much heat energy was gained by the solid…

A:

Q: If 30.6 calories are required to vaporize 25g of water, what is the heat of vaporization (in…

A: The required calories for the vaporization of 25 g of water is = 30.6 calories The heat of…

Q: The heat of vaporization of hexane is 30.8 kJ. mol-1. The boiling point of hexane at a pressure of…

A:

Q: How much heat is required to change  256.0 g  of water at  58.1 ° C  to steam at  100.0 ° C?

A: Given that: Mass of water, mwater = 256.0 g Initial temperature = 58.1⁰C Final temperature = 100.0⁰C…

Q: 1. Non-volatile impurities usually decrease the boiling point of the liquid due to a decrease in the…

A: Since you have posted multiple questions, I will be answering only the first one as per the…

Q: Calculate the amount of heat (in kJ) required to convert 85.0 g of liquid water to steam at 100.0°C

A: Latest heat of vapourisation of Water= 2260 kJ/kg

Q: The graph below represents the heating curve of a substance that starts as a solid below its…

A:

Q: C.The normal boiling point for ammonia is -33.2°C. What is happening to ammonia D.If we are going to…

A: C) Given: The normal boiling point for ammonia is -33.2°C.

Q: at is the boiling point of the substance? °C ch letter represents heating of the solid? ch letter…

A: From the given heating curve,  6. 40 °c 7. 70 °c 8. A  9. E

Q: If the heat of fusion for water is 80. cal/g, how many calories are needed to melt 4.65 g of ice at…

A: Amount of Heat required to melt a solid into liquid is known as the Heat of Fusion. Its Unit is…

Q: Liquid nitrogen boils at 77 K. This image depicts a sample of liquid nitrogen. Which image best…

A: The molecules are far apart in case of gases as the intermolecular force of attraction is least in…

Q: Rank the elements or compounds in the table below in decreasing order of their boiling points. That…

A: The boiling point is determined by the intermolecular forces experienced by the element or compound.…

Q: Consider the substances H2O, KI, H2S, CH4. Which answer has the substances arranged in order of…

A: The boiling point of any substance is defined as the temperature at which the vapour pressure of the…

Q: The melting point of dibromomethane is -53 °C and its ­boiling point is 97 °C. a) What is the state…

A: Answer the given questions from the given data. Given: The melting point of dibromomethane is -53 °C…

Q: How many calories are needed to raise 10 g of ice at -5 °C to steam at 100 °C.

A:

Q: 27) If I had a quantity of this substance at a pressure of 0.75 atm and a temperature of -100⁰ C,…

A: By using this we can solve the given Question .

Q: Label each molecule with the strongest intermolecular force exhibited in the pure substane

A:

Q: t is observed that 1.94 kcal of energy are released when a 27.5 g sample of an unknown liquid…

A: Heat released when a substance is vapourised is equal to the mass times the heat of vaporisation..

Q: Calculate the normal boiling point of the liquid in units of °C.

A:

Q: 25. According to the heating curve above, what letter represents consensation? 26. According to the…

A: As we increase energy, the molecule of substance starts getting heated >> Temperature Goes…

Q: why one gram of steam at 100C causes more serious bum than 1 gram of water at 100c' a. The steam has…

A:

Q: What is the name of a phase change between a gas into a liquid?  a condensation  b evaporating  c…

A: When a gas change into a liquid,the phenomenon is  called condensation.

Q: Which of the following statements about decompression melting is not correct? Select one: a. The hot…

A:

Q: Complete the cooling curve in the figure below and indicate on your drawing (1) the point on the…

A: Given phase diagram:

Q: The physical state(s) present when a substance is boiling is (are)   liquid + solid.

A: Generally, the physical state of the matter comprises the three states. These 3 states play a…

Q: Why does a reaction that has a starting material contain a boiling point of 165 °C whereas a product…

A: Boiling point increases as intermolecular forces increase. The hydrogen bonding is the key to…

Q: 24. Substance A has a boiling point of 13 degrees Celsius, Substance B has a boiling point of 20…

A:

Q: Chlorine trifluoride (ClF3) melts at -76.3 °C and boils at 11.8 °C at a constant pressure of 1 atm.…

A:

Q: How much heat is required to convert 20.0 g of ice at -50.0 degrees Celcius to liquid water at 0.0…

A:

Q: how much energy is required to vaporize 125 g of benzene c6h6 at its boiling point 80.1 C

A: Given, Mass of benzene =125 g Boiling point =80.1°C

Q: f the heat of vaporization of water is 539.5 calories per gram, how many calories of heat are needed…

A: Given that,heat of vaporization of water = 539.5 cal/gmass of water that needs to be vaporized =…

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.