Which of the following substances is liquid at 300 K? A. CH3OH В. СэНя C. diatomic chlorine D. dinitrogen trioxide

Q: Which two phases of matter meet at the critical point of a phase diagram? O liquid gas O solid

A: Phase diagram is a graph between temperature and pressure of a compound and the curve in the  phase…

Q: 4- The pressure is raised on a water sample at zero °C from zero to 900 mmHg, what is the variation…

A: If we decrease the temperature of water up to 0° at this condition water can be solid or liquid…

Q: Q5. What are the intermolecular forces? Differentiate between Van der waals and London dispersion…

A:

Q: Cwater = 4181.3 D- liquid gas condensation vaporization gas C = 2110 Cwase = 2000e vapor C-liquid H,…

A: Q = m . C . (T2-T1)

Q: Diagram the heating curve for water. Assume that the H2O is a solid at a temperature of -30oC and is…

A: For drawing the heating curve of water, the temperature is plotted at the y-axis and heat absorbed…

Q: What process occurs when heating a sample of water from -10 °C to +10°C at constant pressure of 4 x…

A: Option a Melting

Q: Identify all of the intermolecular forces t to a gas. Justify your answers. a. SO2 b. CH;COOH с. Н.S…

A: Solution a. SO2 ; shape  - bent  Due presence of lone pair electrons on S atom, it has non-zero…

Q: What are the components of the apparatus required for determining the boiling point of a liquid?. b)…

A: If only small amount of liquid material available for the boiling point determination, then a micro…

Q: Considering intermolecular forces in the pure substance, which of these substances exists as a gas…

A: Given: We have to identify which among the following exists as gas.

Q: please answer 4

A: To Calculate the heat released when 68.0 gram of steam at 124°C is converted to water at 45℃.,…

Q: ow do you account for the fact that solids and liquids generally expand when heated?

A: In general, the thermal treatment of solids and liquids results in the expansion of state.

Q: a 31.7-g sample of water at 300. K is mixed with 50.8 g water at 320. K. calculate the final…

A: The temperature of 31.7 g of a water sample is = 300. K The temperature of 50.8 g of a water sample…

Q: A. Multiple choice. Encircle the best answer. 1. Which temperature does water have its greatest…

A: The correct answer is given below

Q: D 1.5 P (atm) 1.0- 0.5+ -10 0 10 20 30 40 50 60 70 T (°C) For the given phase diagram, the state of…

A: Phase diagram: The phase diagram is a chart used to show conditions pressure and temperature at…

Q: Which is denser at the same temperature and pressure, dry air or air saturated with water vapor?…

A:

Q: Why does the density of a solid increase with decreasing temperature?

A: 1) Heating a substance causes molecules to speed up and spread slightly further apart, occupying a…

Q: A B E D' F temperature (K) O A Along which line would a sample of pure X be a mixture of solid and…

A: Given diagram is : Complete the table :

Q: Q4. Explain in your own sentences about the phase change processes from -20°C ice to 200°C of…

A: We know that water has freezing point of 0°C , it means that below zero degree celcius temperature…

Q: What is the name of the direct phase change of liquid to gas?

A: Vaporization is the process of transfer of phase from liquid to gas.

Q: Substances like hydrogen, which is a gas at room temperature and pressure, can often be liquified or…

A: To condense H2 ,temperature given is -252.9℃ To freeze H2 ,temperature given is -259.2℃ To find:…

Q: aux orig The average speed of an ideal gas molecule can be calculated using the equation below.…

A: Average speed of a molecule is directly proportional to square root of temperature and inversely…

Q: Explain what you understand about vapor pressure and atmospheric pressure..

A: we have to define and explain vapour and atmosphereic pressure .

Q: The phase diagram below is that of Au-Ag system. 1100 1050 1000 950 900 960°C 0 10 20 30 L 2 L+a 50…

A: The objective of this question is to calculate the maximum temperature at which a 90% gold alloy…

Q: "A 30.0-g sample of liquid gold at 1085°C is poured into a mold and allowed to cool to 18°C.…

A: Given data : Mass of liquid gold sample = 30 g Initial temperature = 1085°C Final temperature = 18°C…

Q: In which portion of this heating curve is the substance purely in the gas phase? D Heat added O E O…

A:

Q: give belo Tollowing the heat capacity of the solid in Diagram and the heat capacity of the liquid in…

A:

Q: Which of the following liquids has the largest enthalpy of vaporization? 0. CH3-CH2-CH2-CH2 CH2 CH3…

A: In the given question we have to identify the largest enthalpy of vaporization of the following…

Q: How much heat? 3kg water, 0oC--> 100oC

A: We have :Mass of water = 3 kgInitial temperature = 0 °CFinal temperature = 100 °CSpecific heat of…

Q: A heating curve of one gram of a pure solid at 1 atm is shown to the right. Which factor affects the…

A: A pure solid is heated. In the given heating curve, Segment AB represents all solid (heat is…

Q: A 193.1 g sample of water at 21.2°C is heated to steam at 131.5°C. How much heat was absorbed?

A:

Q: Is a phase change a chemical change? Why or why not?

A: In chemical changes, the new composition of elements is formed.

Q: Calculate the final temperature of a mixture of 120.0 g of ice initially at -19.50 °Cand 383.0 gof…

A: Specific heat of ice = 0.5 cal/goC Latent heat of fusion of ice = 80 cal/g Specific heat of water =…

Q: Which grouping of the three phases of water is listed in order of the increasing distance between…

A: The density of ice is less than the density of water. This is due to the fact that ice forms an open…

Q: 1. Melting occurs along the: A. AC line B. CB line C. CD line D. All of the choices are…

A: The phase diagram of the compound given is, Where S = solid region, L = liquid region and G =…

Q: Vhich of the following substances has the ighest surface tension? Substance А. CH,OH(I) В.…

A: Applying concept of surface tension which is depend on the intermolecular interaction and carbon…

Q: Ep Ep Ep Ep Which of the following graphs best represents the change in average potential energy…

A: When molecules moves away from each other its potential energy increases

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.