The value ΔH0 of for the reaction 2Ba(s) + O2(g)→ 2BaO(s)is -1107 kJ. Determine the heat released when 15.75 g of Ba(s) reacts completely with oxygen to form BaO(s) in kJ?

Q: 3. When potassium chloride reacts with oxygen under the right conditions, potassium chlorate is…

A:

Q: The value of AU for the combustion of propane, C3H8, is -185.81 kJ. What is the heat of formation of…

A: Heat of formation of propane can be calculated as given below.

Q: A sample of toluene undergoes combustion in a bomb calorimeter that is insulated by 814 g of water…

A: Given: Mass of water = 814 g. Heat capacity of calorimeter = 1015 J/oC And the increase in the…

Q: The thermite reaction, used for welding iron, is the reaction of Fe3O4 with Al. 8 Al (s) + 3 Fe3O4…

A: The question is based on the concept of reaction stoichiometry. First, we determine the limiting…

Q: 100 J of heat is released by the system and it does 100J of work. Which of the following is true? A.…

A: When energy is released from the system to the surroundings, the sign is negative while it is…

Q: A chemical reaction is run in which 698 Joules of heat are absorbed and the internal energy changes…

A:

Q: A piston compresses the air in the cylinder by doing 84J of work on the air. As a result, the air…

A: Given,  What is change in internal energy = ΔU = ?

Q: The enthalpy change for the reaction of hydrogen gas with fluorine gas to produce hydrogen fluoride…

A: The formation of hydrogen fluoride from hydrogen gas and fluorine gas is expressed as, H2g+F2g→2HFg…

Q: 5.2 b Calculate the magnitude of q for a system that does 7.05 × 105 kJ of work on its surroundings…

A: From given data W = -7.05×105 kJ ∆U = -9.55×103 kJ W is negative because work is done by system on…

Q: Butane, C4H10, is widely used as a fuel for disposable lighters. When one mole of butane is burned…

A:

Q: Consider the following reaction: 2Mg(s) + 02(g) → 2M90 AH = -1204kJ How many kilojoules of heat are…

A: 1- First we will calculate the  moles of MgO(s)  moles = [ mass / molar mass ]  moles = [ 7.50g /…

Q: What are the signs of q and w if a system absorbs 180 J of heat while expanding (performing work on…

A:

Q: A chemical reaction in a bomb calorimeter evolves 5.17 kJ of heat. If the heat capacity of the…

A: Given, the heat evolved, q = 5.17 kJ Heat capacity, c = 1.08 kJ/°C Temperature, ΔT = ? The formula…

Q: Calculate the value of ΔE for a system that loses 50 J of heat and has 150 J of work performed on it…

A: Given: The system loses 50 J of heat. And the work done on the system = 150 J.

Q: The value of AH° for the reaction below is 128.1 kJ CH ,OH U - Co, 2(8) + 2H. 2(8) How may kJ of…

A: Given chemical equation is  CH3OH(l) -----> CO2(g) + 2H2(g) Enthalpy change, ∆H° = 128.1 kJ  We…

Q: A sample of sucrose, C12H22O11 weighing 0.1328 g, was burned to completion in a bomb calorimeter at…

A: Given: sucrose sample weight   =   0.1328 g,  Temperature                      = 25°C,…

Q: The combustion reaction of nitromethane fuel occurs as follows: → 2 CO2(g) + 3 H20(1) + N2(g) 2…

A:

Q: The value of ΔH0for the reaction CH3OH(l) → CO(g) + 2H2(g) is +128.1 kJ. Determine the heat consumed…

A:

Q: Calculate the change in internal energy for a system that is giving off 45.0 kJ of heat and is…

A: According to the second law of thermodynamics, change in internal energy is related to heat and work…

Q: When gasoline burns in an automobile engine, the heat released (325 J) causes the products CO2 and…

A: It is given that 325 J of heat is released when gasoline is burned, and the work done by the gases…

Q: Why not all endothermic processes that do work on the surroundings have the same sign for internal…

A: Endothermic processes are the processes which absorb heat energy from the surroundings. These…

Q: The ΔH for the oxidation of sulfur in the gas phase to SO3 is -204 kJ/mol and for the oxidation of…

A: The enthalpy of reaction (ΔH0rxn) is the heat released or absorbed during a chemical reaction.…

Q: What is a standard state? What is the standard enthalpy change for a reaction?

A: Standard state of a material is the reference point  that is used to calculate its properties under…

Q: A sample of nickel is heated to 99.8°C and placed in a coffee-cup calorimeter containing 150.0 g…

A: The equation used to calculate heat released or absorbed follows:        ......(1) where, q = heat…

Q: Calculate the change in the internal energy for a certain process if 800 J of work is done on the…

A:

Q: The complete combustion of ethanol, C2H5OH(l), to form H2O(g) and CO2(g) at constant pressure…

A: Given :-  complete combustion of ethanol  C2H5OH(l) + O2(g)→ H2O(g) + CO2(g) + 1235 kJ/mol  To write…

Q: When gasoline burns in an automobile engine, the heat released (325 J) causes the products CO2 and…

A: Given:   The heat released is 325 J. The work done by gas during expansion is 451 J.

Q: Benzene (C6H6) burns in air to produce carbon dioxide and liquid water. How much heat is released…

A:

Q: when octane (C8H18) is burned under standard conditions, the enthalpy of combustion is -5578.64KJ /…

A: Given that : The enthalpy of combustion = -5578.64 kJ/mol Heat of formation of octane = ?

Q: (6) 2. Octane, a major component of gasoline, burns according to the reaction: 20,H ) 250,…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be 215.5 kJ : CH4(g)…

A:

Q: KJ/mol. The heat of reaction for the combustion of a mole of Ti in this calorimeter is

A: The ∆Hcombustion is the amount of heat in the energy needed to burn per mole of a substance. Its…

Q: Many portable gas heaters and grills use propane, C3H81g2, asa fuel. Using standard enthalpies of…

A: The balanced reaction is,

Q: Use standard enthalpies of formation to determine ΔHorxnfor: 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l)…

A: Standard enthalpy of formation is defined as the amount of heat absorbed or evolved in the formation…

Q: Benzene (C6H6) burns in air to produce carbon dioxide and liquid water. How much heat is released in…

A:

Q: What is the change in the internal energy of the system if the surroundings releases 300J of heat…

A:

Q: The combustion of a sample of aluminium produces 0.25 mol of aluminium oxide and releases 419 kJ of…

A: The reaction given is, Given: Moles of Al2O3 produced = 0.25 mol. And the amount of heat released =…

Q: 1. The combustion of a sample of aluminium produces 0.25 mol of aluminium oxide and releases 419 kJ…

A: The combustion reaction of aluminum is given by: Als + 34O2g  → 12Al2O3s The enthalpy change in…

Q: Consider the following thermochemical reaction for kerosene: 2C12H16 (l) + 37O2 (g) → 24CO2 (g) +…

A:

Q: The standard enthalpy of combustion of ethanol (C2H5OH) is -235.1 kJ/mol. How many kilojoules of…

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and…

Q: when octane (C8H18) is burned under standard conditions, the enthalpy of combustion is -5698.34KJ /…

A: Given: The enthalpy of combustion is -5698.34 KJ/mol.

Q: Octane 1C8H182 is a liquid hydrocarbon at room temperature that is a constituent of gasoline.…

A: We have the equation ∆G°=∆H°-T∆S° Where ∆H° is change in enthalpy, ∆G° is change in free energy, T…

Q: A 2.673 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A: Tf = 28.80°C  Ti = 25.03° C ΔT = Tf - Ti = 28.80° C - 25.03 ° C                                =…

Q: A 3.623 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A: Given, The weight of sample is 3.623 g. The given temperature values are 23.53 ˚C and 30.40 ˚C. The…

Q: The value of AH° for the reaction below is 128.1 kJ CH ,OH CO2es + 2H, (1) 2(g) 2(g) How may kJ of…

A: Enthalpy is thermodynamic property which is extensive in nature

Q: When 1 mol of a fuel is burned at constant pressure, it produces 3455 kJ of heat and does 12 kJ of…

A: Delta E = q + w  where Delta E = change in internal energy  q = heat , w = workdone

Q: Suppose that the molar enthalpy of a reaction is 56.94 kJ/mol and 16.89 kJ of heat are absorbed by…

A: The amount of heat required to raise the temperature of the sample is given by: q = mc∆T 'q' is the…

Q: The standard molar enthalpy of formation for oxygen gas, O2(g), is zero. The enthalpy of formation…

A: Molar enthalpy of formation of a substance is the energy required or released when one mole of a…

Q: A sample of 0.562 g of carbon is burned in oxygen in a bomb calorimeter, producing carbon dioxide.…

A: Given: Mass of carbon = 0.562 g Initial temperature = 26.74°C Final temperature=27.93°C To find; The…

Q: Calculate ΔE for a system that absorbs 506.0  kJ of heat from its surroundings and does 379.0  kJ of…

A: It is a given that a system absorbs 506 kJ of heat and the system does 379 kJ of work on the…