How do you tell whether an element on the periodic table is positive or negative?

Q: 8 https:/ aloud O THERMOCHEMISTRY Calculating pressure-volume work A mixture of helium and hydrogen…

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Q: Silane, SiH4, burns according to the reaction, SiH4 + 2O2 → SiO2 + 2H2O, with ΔH° = –1429 kJ. How…

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Q: Define The Nature of Energy?

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

Q: Determine the Sign of #H?

A: Answer Sign of H for a reaction

Q: The calculations outline in the procedure do not account for the warming of the melted ice to the…

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Q: ____ is the ability to do work or produce heat. Group of answer choices Radiation Gravity Energy…

A: ____ is the ability to do work or produce heat that has to be found.

Q: Which flame would be used to heat a beaker of water in a Bunsen burner? Why?

A: Blue flame would be used to heat a beaker of water in a Bunsen burner.

Q: 2. Calculate the energy required in kJ to raise the temperature of 2kg of water fror 10°C to 90 °C.

A: Water remains in liquid phase at both temperature - 10 and 90 degree Celsius.

Q: If a 305.4 gram mass of copper that is initially at 24 degrees C is given 1,234 Joules of energy,…

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Q: Which of the following has the highest heat capacity? a. glass b. metal metalloid c. super…

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

Q: A piece of silver with mass of 20.0 g is immersed in 25.0 g of water. This system is heated…

A: Given:Mass of silver = 20.0 gMass of water = 25.0 gThe system is heated from 24.2 to 36.8°C.Cp…

Q: Write the balanced chemical equation for the combustion of benzene, C6H6(l), to give carbon dioxide…

A: Combustion is a process of burning or reaction in presence of O2. It is an exothermic process.

Q: 3. If 7,500 J of energy is added to 1.43 kg of iron (originally at 25.0°C), what temperature will it…

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Q: A 611.4 g sample of mercury absorbs 195.8 joules of heat. The specific heat capacity of mercury is…

A: Detail mathematical calculation is shown below

Q: Calculate the energy needed to heat the cube of copper, with a volume of 14.0 cm3cm3 , from 18 ∘C∘C…

A: Since density of copper is 8.96 g/cm3                                                   ( using…

Q: How much energy is needed to change the temperature of 39 g of water from 10.0 °C to 95.0 °C?

A: Since water remains in liquid form from 10°C to 95°C . Heat required, Q = mcp(l) ∆T ,where m is the…

Q: Silane, SiH4, burns according to the reaction, SiH4 + 2O2 → SiO2 + 2H2O, with ΔH° = –1429 kJ. How…

A: To solve this problem we will use the given thermochemical equation .

Q: 5.45 State Hess’s law. Explain, with one example, theusefulness of Hess’s law in thermochemistry.

A: ANSWER IS DISCUSSED BELOW :

Q: O THERMOCHEMISTRY Calculating pressure-volume work A mixture of krypton and argon gas is compressed…

A: The work done can be calculated by using formula W= -P∆V

Q: 5.137 Both glucose and fructose are simple sugars with the same molecular formula of C6H12O6.…

A: The number of moles of glucose in 2.0 g of glucose tablet is determined as follows.…

Q: What is studied in the field of thermochemistry? volume changes that occur during chemical reactions…

A: Thermochemistry or thermodynamics is a branch of Chemistry in which we study about the change in…

Q: A chemist measures the energy change AH during the following reaction: 2 Fe,O3(s) → 4 Fe(s)+O,(9)…

A: For the given reaction, we need to calculate the amount of heat absorbed/released.

Q: How much energy is required to raise the temperature of 13.4 grams of gaseous krypton from 20.3…

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Q: If 7.30 kJ of energy are required to change the temperature of a sample of  water from 5.0 oC to…

A: For any substance weighing 1.0 g, the heat essential for raising the temperature by one Kelvin or…

Q: What unit measures the energy related to the work done by an electron through an electrical…

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Q: .It takes 1.25 kJ of energy to heat a certain sample of pure silver from 12.0°C to 15.2°C. Calculate…

A: Specific heat capacity of pure silver is 0.24 J/g°C

Q: A chemist measures the energy change AH during the following reaction: Cl,(9)+H,(g) → 2 HC(g)…

A: Answer given as follows

Q: Why is thermochemistry important?

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

Q: surroundings, what is the AE for the surroundings?

A: The first law of thermodynamics is mathematically expressed as: ∆E=Q+W∆E=Q+W.............. (1) Where…

Q: If 7.30 kJ of energy are required to change the temperature of a sample of  water from 5.0 oC to…

A: The energy required to raise the temperature of 'M' g of a substance by 'T' degree celsius is given…

Q: If 246,000 J of energy are required to raise 10 kg of sodium from 15°C to 35°C, what is the specific…

A: Given :-  q = 246000 J  Mass of sodium (m) = 10 kg  Initial temperature = 15°C  Final temperature =…

Q: Silane, Si burns according to the equation  Si + → Si + 2O Δ= -1429 kJ. How much energy is released…

A: Note: the correct equation for the burning of Silane is, SiH4 + 2O2 → SiO2 + 2H2O ΔH° = -1429 kJ…

Q: what are some examples of potential energy?

A: Potential energy is the energy held by an object because of its position relative to other objects,…

Q: 2. Write the balanced chemical equation for the combustion of benzene, C6H60, to give carbon dioxide…

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Q: Thermochemistry is the study of the heat changes that occur during chemical reactions and physical…

A: Here is your answer

Q: Do metals become positive or negative? Would a metal be attracted to water's hydrogens or oxygen?…

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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: What is the AH value for an exothermic energy change? * Always negative Always positive Could be…

A: Thermodynamics is branch of chemistry in which we deal with amount of heat evolved or absorbed…

Q: Which of the following scenarios could not happen because it violates the 1st law of thermodynamics?…

A: To find : Which option violates 1st law of thermodynamics.

Q: How much energy is required to raise the temperature of 10.8 grams of gaseous helium from 24.6 °C to…

A: Helium is inert gas  Helium atomic number is 2  Helium mass number is 4

Q: 1 atm, how much energy is required to heat 85.0 g H, O(s) at -18.0 C to H, O(g) at 125.0 C? Use

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Q: The total energy of the universe is constant. Explain the statement?

A: The total energy of the universe is constant. The above statement has to be explained.

Q: A chemist measures the energy change AH during the following reaction: 2 Fe,03(5) → 4 FeO(s)+O2(g)…

A: Given: ∆H=560 kJ The molar mass of Fe2O3= 159.69 g/mol Solution: For the given reaction,…

Q: Water that contains deuterium rather than ordinary hydrogen is called heavy water. The specific heat…

A: Given,specific heat of heavy water at 25 deg. C. is 4.217J/g deg. CMass of water = 10gChange in…

Q: If we have a 45.0 g block of aluminum that is at 22ºC and heat it up with 1545 J of energy, what…

A: Since, specific heat of Al= 0.9 J/(g℃) so, Q = mCv∆T

Q: Explain why hell is exothermic?

A: Exothermic reaction During the reaction the heat is released from the system is called exothermic…

Q: A sample of water (80 grams) had a temperature change of 6. ℃. What was the heat change of this…

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Q: Suppose that the total mass of the reactants in a chemical reaction was 100.00000 g. How many…

A: Given that, the mass of the reactants is mR = 100.000 g. The mass of the products is mP = 99.999 g.…

Q: 1. A 1.60g sample of a metal that has the appearance of gold requires 5.8J of energy to change its…

A: Given,  Mass of the metal = 1.60 g  Initial temperature = Ti = 23.0 0C Final temperature = Tf = 41.0…