12. Which scenario is Hess' law not used for?

Q: What is Hess's law explain with example?

A:

Q: Consider a gas in a 1.0-L bulb at STP that is connected via a valve to another bulb that is…

A: Volume of gas in the bulb = 1.0 LEvacuation of gas is done to another bulb ∆H = to be determinedq =…

Q: What is the main use of Hess’s law?

A: Hess’s law: According to this law, the energy change in a complete chemical reaction is equivalent…

Q: Determine the Sign of #H?

A: Answer Sign of H for a reaction

Q: It takes 57.5 J of energy to raise the temperature of 115.4 g of mercury from 23.61°C to 27.17°C.…

A: We know that the energy supplied is equal to the internal energy change of the molecules.

Q: As f changes to e, is there a continuous decrease in temperature? Explain why

A: We can observe that f change to e then condenstation process takes place. Gas convert into liquid…

Q: A 30.9 g sample of copper at 99.8 °C is carefully placed into an insulated container containing 196…

A:

Q: A 200-lb man decides to add to his exercise routine by walking up three flights of stairs(45 ft) 20…

A: First of the man in kg are determined.

Q: Add your experimentally determined enthalpies in the same way as above: Explain how the sum of your…

A: To determine the enthalpy of the reactions that will add up to form the net reactions, NaOH(s)…

Q: What is the main application of Hess’s law?

A: Hess's law is used for calculation of enthalpies of reactions with the help of enthalpies of…

Q: A chemical reaction is run in which 345 Joules of heat are generated and the internal energy changes…

A: The relationship between heat, internal energy change and work is given by  ΔE = q + w  where ΔE…

Q: Determine the specific heat capacity (in joules) of an alloy that requires 50 kJ to raise the…

A: In this question, we want to determine the specific heat capacity for an alloy..  You can see…

Q: The specific heat capacity of solid iodine is 0.427 J/g⋅⋅oC.  Calculate the final temperature (°C)…

A:

Q: The energy of the universe is constant That what mentioned by the first law of thermodynanics Does…

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

Q: 14. Kelvin statement of the Second Law of thermodynamics is MAY

A:

Q: an 152.05 L piston is compressed to 58.71 L aginst n external pressure of

A: Pressure = 1.79 atm  Initial volume (V1) = 152.05 L  Final Volume (V2) = 58.71 L Now Work =…

Q: Discuss the definition of the terms exothermic and endothermic. Give an example of an thermochemical…

A: The exothermic reaction is the reaction that releases heat. The heat of the reactant is higher than…

Q: (a) Which terms in mathematical expression that states the First Law of Thermodynamics are state…

A:

Q: References Use the References to access important values if needed for this question. A chunk of…

A: Given: Mass of zinc, m1, 19.7g Mass of water, m2 , 80.1g Initial temperature of zinc, T1 = 98.58oC…

Q: What quantity of energy is needed to heat a 1.00 mole sample of H2O ‍ from  -30.0 degrees C to 140.0…

A: Since in heating H2O ‍from -30 0C to 140 0C following steps will happen 1) Heating of ice from -30…

Q: 6. What is the unit of Gibbs free energy? a) Kelvin b) Joule c) Kilowatt d) Newton

A: What is the unit of Gibbs free energy ?

Q: What statement is False? A). in an endothermic process, heat is transferred from the surroundings…

A: *Statement-A The reaction in which heat is released from system to surrounding is called exothermic…

Q: (11) A sample of 770 mol of nitrogen gas is maintained at a constant pressure of 1.00 atm in a…

A: THIS CAN BE SOLVE USING FIRST LAW OF THERMODYANAMICS CHANGE IN INTERNAL ENERGY = HEAT ABSORBED +…

Q: Thermochemistry - Measurements in constant pressure calorimeter The calculation of the error in the…

A: The device which is used to determine the enthalpy change of a chemical reaction is known as…

Q: Which of the following statements is/are TRUE? I. Enthalpy is the heat content of a particular…

A: As this a multiple choice question. The answer is given below:

Q: Why is thermochemistry important?

A: Thermodynamics gives the study of the relation between heat, work, and various energy forms. System…

Q: How much heat is required to raise the temperature of 13.5grams of water at 15°C to 25°C? SHOW ALL…

A: Answer:- This question is answer by using the simple concept of calculation of heat required to…

Q: A balloon expands from 0.75 L to 1.20 L as is is heated under a constant pressure 1.01 × 105 Pa.…

A:

Q: Define about Heat Capacities ?

A: Amount of heat required to raise the temperature of a substance by 1oC is known as heat capacity.…

Q: A block of copper of unknown mass has an initial temperature of 67.7 ∘C∘C. The copper is immersed in…

A:

Q: (e) Discuss the importance of Hess law with suitable example.

A: Hess law states that when a thermodynamical Chemical Reaction take place by help of only one step or…

Q: Given values: Substance: oxygen (O2) specific heat capacity (c): 0.918 J/(g.°C) amount (m): 899.7 g…

A:

Q: Which of the following statement is/are true abe I. Energy is can be transferred and transformed.…

A: According to first law of thermodynamics:  It is the law of conservation of energy and can be stated…

Q: State Hess’s law. Explain, with one example, the usefulness of Hess’s law in thermochemistry.

A: The question is based on the concept of chemical thermodynamics. we have to explain the Hess law and…

Q: Is temperature a state function? Why?

A: In thermodynamics, every function can be distributed either as a state function or as a path…

Q: 1421J of heat is required to raise the temperature of 350g of metal by 32.00C. Find the specific…

A:

Q: f a 10L balloon at 20ᵒC is placed in a hot car with a temperature of 45ᵒC, what will happen?

A: To solve this problem we will use Charles's law .

Q: What is thermochemistry? Why is it important?

A: Thermochemistry comes from two words- 'Thermo' means heat and 'chemistry' is simply the study of…

Q: A sample of water with a mass of 23.31g and an initial temperature of 367.67K loses 8615J. What is…

A: Final temperature will be 279.25 K. Solution : We know the relations of specific heat capacity…

Q: Mass of aluminum 16.27 g Initial temperature of Al Volume of water 83.85°C 51.8 mL Initial…

A: a) Heat is given by: q=mc∆T                            ...... (1) where m = mass, C= specific heat…

Q: 6.45 A 455-g piece of copper tubing is heated to 89.5°C and placed in an insulated vessel containing…

A: Given mass of copper = 455 g Initial temperature of copper = 89.5°C mass of water = 159 g Initial…

Q: Why are ∆fusS and ∆vapS of a system always positive values?

A: We have to state reason for positive values of ∆S values.

Q: A) When H2S(g) reacts with O2(g) according to the following reaction, 518 kJ of energy are evolved…

A: It is given that, energy released ( H ) for the reaction of 1 mole of H2S with O2 is 518 kJ.

Q: For the problems below, write a balanced equation and then use dimension analysis to solve for the…

A:

Q: 7,845 cal is equal to how many Joules

A: Given that a question of 7845 calories is change of joule.  1 calories is equal to 4.184 joules

Q: 0.020 mole of gold metal that has a specific heat capacity of 2.10 J/g °C released 5.20 kJ o heat.…

A:

Q: A piece 59.07g metal weigh ing was heated to 100.0°C and then put it into 100. 0 mL (initially at…

A: