The values of AH° (298 K) for SO2 and SO3 are -296.8 and -395.7 kJ/mol respectively. What is the value of AH°rxn for 2SO2 + 02 -→ 2S03 -98.9 -197.8 B 197.8 C 98.9 .D

Q: What quantity of energy, in joules, is required to raise the temperature of 455 g of tin from room…

A:

Q: What is the specific heat of a metal substance if 135 kJ of heat is needed to raise 5.1 kg of the…

A: Given,  The mass of a metal = 5.1 kg.  The heat needed to raise temperature from 18.0 °C to 31.5 °C…

Q: Given that ΔHvap is 46.4 kJ/mol, and the boiling point is 83.4°C, 1 atm, if one mole of this…

A: When vaprizaton occur means randomness increase means entropy will increase. So that we calculate…

Q: If the standard molar heats of formation of ammonia, NH3(g), and gaseous water, H20(g), are -46…

A: standard molar heats of formation ammonia, NH3(g) = 46 kJ/mol gaseous water, H20(g) = -242 kJ/mol **…

Q: Ethanol melts at -114 C and boils at 78 C at a constant pressure of 1 atm. What state of matter must…

A: We have given that  Ethanol melts at -114°C and boils at 78 °C at a constant pressure of 1 atm. What…

Q: Steam can cause more severe burns than water, even if both are at the same temperature. Calculate…

A: Heat can be calculated using formula q=ms∆T q= heat m= mass s= specific heat ∆T= change in…

Q: For 2-methylbutane, the AH° of vaporization is 25.22 kJ/mol and the AS° of vaporization is 84.48…

A: ∆H°, ∆S°, pressure and temperature of vaporization of 2-Methylbutane, whose ∆G° is to be determined.

Q: which of the following phase transitions is/are exothermic? 1. liquid water evaporating into the…

A: In this question, we will selecting those statements which are exothermic process.  Exothermic…

Q: 6. Mass of water (2- 1) 102a lousg-4.28g=101.99g %3D 7. Temperature change (4- 3) -20.1°C oC…

A: Joules lost by water = Mass of water ×temperature change×Specific heat capacity

Q: What is the change of energy (L. atm) of a system that absorbed 15.7 L.atm of heat and had its…

A:

Q: In an experiment, 10.0 g of ice at −20.0°C is converted into steam with a temperature of 110.0°C.…

A: Given,  10.0 g of ice at −20.0°C is converted into steam with a temperature of 110.0°C. The required…

Q: It takes 38.6 kJ of energy to vaporize 1.00 mol of ethanol (MW: 46.07 g/mol). What will be ΔSsys for…

A: The amount of energy required to vaporize 46.7 g of ethanol is 38.6 kilojoules. The amount of heat…

Q: 200 kj/mol O Kj/mol AG⁰ -200 kj/mol Hg+ 02 ↑ HgO Temperature

A: (a) There is a sudden change in the slope at a particular temperature for  HgO. This is due to the…

Q: Assuming no phase transition, what is the change in Tempe (C°) if 310.0 mL ethanol (molar mass 46.08…

A:

Q: 15) What is the (s, 1, g) of a substance at 0.5atm and 100°C? 16) What is the (s, 1, g) of a…

A: A phase diagram is a visual depiction of a substance's physical states under various pressures and…

Q: 18. The heat of vaporization of a liquid (AHvap) is the heat required to vaporize 1.00 g of a…

A: Given that -  Mass of nitrogen liquid used = 60.0 g  Mass of water used = 200 g  Initial temperature…

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

A:

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

A: Nitrogen gas is at -196°C and when it is put in dewar flask which is at -260°C the temperature of…

Q: How much heat was absorbed (in J) if a 19.6 g sample of an alloy with a specific heat of 0.316 J/g…

A:

Q: A 100.0-g bar of cadmium is heated from 25 °C to 50 °C during which it absorbs 578 J of heat. Assume…

A: Given data :  Mass of Cd bar = 100.0 g  Temperature change ,∆T = 50°C - 25°C = 25°C = 25K  (Because…

Q: The heat capacity of ice is 2.108 J/g C. If I take an 8.019 g sample of Moderna vaccine that is kept…

A: Given, Mass of the sample (m) = 8.019 g Initial temperature (Ti) = -68.7 °C Final temperature (Tf) =…

Q: I am poor at physics chem, so please explain as much as possible.

A: The equation for the formation of diborane is given below.2 B(s) + 3 H2(g) ---> B2H6 (g)

Q: The following information is given for water, H,O, at latm: AHvap(100 °C) = 40.7 kJ/mol boiling…

A: Heat of vaporization (∆Hvap)- The energy required to convert 1 gram of liquid water to its vapor…

Q: The specific heat of silver 0.24 J/g°C. How many joules of energy are needed to warm 4.37g of silver…

A:

Q: For one mole of gas, If you Cv = 29.14 J/K.mol. What will be the value of Cp (R=8.314J/K.mol)

A:

Q: A 24.6 g chunk of metal is heated up in a Bunsen burner flame and dropped into an insulated vessel…

A: Given: Mass of chunk of metal, mmetal=24.6 g Final temperature, T2=25.6°C Initial temperature=T°C…

Q: How much energy in kilojoules is released when 28.6 g of ethanol vapor at 82.0 ∘C is cooled to -16.0…

A:

Q: Calculate AG° at 599 K for H20(g) + 1/2 02(g) = H202(g) using the following data: H2(g) +02(g) 5…

A: In the given question equilibrium constant of the reaction is determined with the help of…

Q: It takes 38.6 kJ of energy to vaporize 1.00 mol of ethanol (MW: 46.07 g/mol). What will be ΔSsys for…

A: Given: Enthalpy change of evaporation = 38.6 KJ/mol. Temperature = 79.6 oC And the mass of ethanol…

Q: The critical temperature for benzene is 289 "C. Which of the following statements is TRUE for…

A: The heat of vaporization is temperature dependent, as increasing the temperature the heat of…

Q: bject) ftantilludel.edux Mail-Francesca A Tantillo-Out x START HERE CHM150-251 Che X C app.101edu.co…

A: For any phase to exist in equilibrium, the point at the phase diagram should coincide between all…

Q: For pentane, the AH of vaporization is 26.22 kJ/mol and the AS of vaporization is 87.88 J/mol-K. At…

A:

Q: Classify each of the following chemical changes as exotermic or endotermic reaction a)Ca(OH)2 (s) +…

A: Given reaction a) Ca(OH)2 (s) + 65.3 KJ -------- CaO(s) + H2O(l) b) 2 Al(s) + Fe2O3(s)-------…

Q: Consider the reaction: 2A(g) + B(g) → 2C(g) If ΔG° = 50.0 kJ/mol at T = 25°C and PA = PB = 1 atm and…

A:

Q: 12) Consider the sublimation of iodine at 25.0°C. I2(s) --> I2(g) a) Find ∆ Grxn° at 25.0°C  b) Find…

A: Given reaction is :  I2 (s) --> I2 (g) a) Find ∆Grxn° at 25.0°C b) Find ΔGrxn° at 25.0°C under…

Q: It takes 38.6 kJ of energy to vaporize 1.00 mol of ethanol (MW: 46.07 g/mol). What will be ΔSsys for…

A:

Q: Calculate the total enthalpy change (kJ) for the following reaction:   H2O (s, 90 g, –10. oC)…

A: In the above process, 3 steps are involved 1) Heating of 90 grams ice from –10 oC to 0 oC  2) fusion…

Q: A person ate 0.50 pound of cheese (an energy intake of 4000 kJ). Suppose that none of the energy was…

A: Solution:- Given data => mass of cheese = 0.50 pound  Total energy intake = 4000 kJ  Energy…

Q: A laboratory “volcano” can be made from ammonium dichromate (252.07 g/mol). When ignited, the…

A: Here we are required to calculate the heat energy that would be produced when 28.3 g of ammonium…

Q: Part A)   The standard molar heat of formation of water vapor (steam) is -242 kJ/mol. What amount…

A: Only first question is answered according to the policy

Q: /The melting point of benzene is 5.5°C. Predict the signs of AH, AS, and AG for melting of benzene…

A: Given: Melting point of Benzene = 5.5 °C at -5°C 1) Melting Breaks a bonds ==> Endothermic =>…

Q: C. How many grams of methane must react to produce 5.15kJ of heat? d. How much heat is released when…

A: Balanced chemical equation: CH4  +   2O2 ------>  CO2  +  H2O  +   890 kJ Molar mass of methane =…

Q: What is the expected sign of AS for the following changes? condensation of steam to liquid water…

A: Intermolecular forces refer to the type of interactions which are present in between atoms or…

Q: 7 2 Mg + Oz AH = -1204 K). A Is the atove equation exotherwmie or endothermic B. calulate the amount…

A: 2Mg +O2 -------> 2MgO  ΔH = -1204 kJ A. The reaction is exothermic because ΔH is negative. This…

Q: Write the thermochemical equation of one mole of nitrogen gas, N2 reacts with oxygen gas, 02, two…

A: A Thermochemical Equation is a balanced stoichiometric chemical equation that includes the enthalpy…

Q: How much energy is required to convert 42.0g of water at 100°C to steam at 138°C? O A. 102,00OJ O B.…

A: Total heat required (Q) = Heat required for the conversion of liquid water at 100 deg C to gas at…

Q: Which one of the following processes is exothermic? A 0:(g) → O(g) B O(g) + e → O²(g) C (g) + e →…

A:

Q: How much energy will be released by cooling 28.2 grams of steam from 118°C to 37°C?   cice = 2.02…

A: Here we have to determine the amount of heat required to convert 28.2 g of steam from 118°C to…

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.