A friend asks you to invest in a new flashlight he invented that never needs batteries. What questions should you ask before writing a check? and Discuss the significance of the law of energy conservation in relation to the flashlight as well as express some new energy sources that are being researched for the near future .

Q: ) Determine the enthalpy change for this reaction:  2NaOH(s)+CO2(g)→Na2CO3(s)+H2O(l)

A: Given : We have predict the enthalpy change for the given reaction: 2NaOH(s)+CO2(g)→Na2CO3(s)+H2O(l)

Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 0.96 kJ/°C. When…

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Q: (Equation 1) 4 Fe2O3(s) + 20 NO2(g) + 22 H200) + 5 O2(g) → 8 Fe(OH)3(s) + 20 HNO3(ag) AH= -1811.2…

A: Given :-  4Fe2O3(s) + 20NO2(g) + 22H2O(l) + 5O2(g) → 8Fe(OH)3(s) + 20HNO3(aq), ∆H = -1811.2 (kJ/mol)…

Q: 2. Cold packs take advantage of the fact that dissolving NH4NO3 in water is an endothermic process.…

A: Mass of solid, NH4NO3(s) taken = 5.44 g  Initial temperature, Ti = 18.6 oC  Mass of water taken =…

Q: If 0.10 mol ammonium chloride (NH CI) is dissolved in water producing 1.01 x 10 g of solution, the…

A: Answer :- Q = 6.16 × 102 (cal)…

Q: Consider an electron and a proton that are separated by 230 pm. What is the electrostatic potential…

A: Given data:  Distance d = 230 pm Formula used: Eelectrostatic=KQ1Q2d

Q: In 2008 the approximate energy consumption for the entire population of earth for an entire year was…

A: The energy consumption for the entire population of earth is 4.74×1020Joules. The energy of the…

Q: When a sample of Mg is combusted in a bomb calorimeter, 25.4 kJ of energy as heat is evolved. The…

A: Assuming the final temperature of water and bomb calorimeter in equilibrium is T. Hence the change…

Q: Which of the reactions are exothermic? 2 Mg(s) + O,(g) → 2 MgO(s) + heat NH, (g) + HCI(g) → NH,CI(s)…

A: If heat is produced as one of product then the reaction is exothermic. If heat is used as reactant…

Q: Using these reactions and enthalpies calculate the enthalpy of reaction for C3H4(g) + 2 H2(g) →…

A:

Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 1.09 kJ/°C. When…

A:

Q: Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the…

A: Required equation: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) N2(g) + O2(g) → 2NO(g) ΔHrxn = -43.1 kcal…

Q: Part A: Calorimetry Tip for calorimetry problems: Always remember the 1" Law of Thermodynamics:…

A:

Q: TUTOR Coffee Cup Calorimetry: Specific Heat I In the laboratory a "coffee cup" calorimeter, or…

A:

Q: What is the energy of system A? What is the energy of system B? In how many ways can the energy of…

A: we have given the two diagrams showing the energies (boxes) of each of four A particles and four B…

Q: A house is designed to have passive solar energy features, brickwork incorporated into the interior…

A: Gallons of water have to be converted to litre:

Q: 26 kJ of work and loses 216 kJ of heat to the surroundings. ge in internal energy, AE, of the…

A: First law of thermodynamics is based on conservation of energy

Q: Given these reactions, where X represents a generic metal or metalloid 1) H, (g) + 0,(g) → H,O(g)…

A: Given,

Q: A 2.5 gram cheese puff is burned under a beaker with a 100.0 -gram sample of water and raises the…

A: Given, A 2.5 gram cheese puff is burned under a beaker with a 100.0 -gram sample of water and raises…

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HC1(aq) 2 MCI, (aq) + 3…

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Q: In a calorimetry experiment 5.6 g of potassium hydroxide is dissolved in 400 mL water in a thermos…

A: In the given question we have to calculate the enthalpy change of the following,  first of all, we…

Q: What do you think would happen if energy were not conserved? Think of (and share) two scenarios in…

A: Since you have posted a question with multiple questions, we will solve first question for you. To…

Q: Which of the following statements about internal energy, E, is false? а. It represents all the…

A: Answer :- (D)  The false statement about internal energy E is  (d) ∆E is positive in exothermic…

Q: When 1 mole of 12(g) reacts with Cl₂(g) to form ICI(g) according to the following equation, 26.8 kJ…

A: Recall the given equation,                                I2 g  +  Cl2 g  →  2 ICl gWhen 1 mole of…

Q: 20 The Romans used calcium oxide, CaO, to produce a strong mortar to build stone structures. The CaO…

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Q: Benzoic acid of mass 1.20 g is reacted with oxygen in a constant volume calorimeter to form H₂O(1)…

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Q: To determine whether a shiny gold-colored rock is actually gold, a chemistry student decides to…

A: Answer Part-B:- Mass (m) = 4.7 g Initial T1  = 25 °C = 298 K final T2 = 57 °C = 330 K From the…

Q: Assume a car is rated at 28.0 miles/gallon using gasoline only at $3.50/gallon and 22.5 miles/gallon…

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Q: A chemist measures the enthalpy change AH during the following reaction: C,H„0g(s)→2C0,(g) +…

A: The enthalpy change for the given reaction is given as follows- C6H12O6 (s) →2 CO2 (g) + 2 C2H5OH…

Q: A coal-burning power plant generates electrical power at a rate of 950 megawatts (MW), or 9.50 x 108…

A: The formula for efficiency is :- Efficiency = Useful Output Energy / Input Energy Now, rearranging…

Q: Consider the following chemical reaction which produces nitric oxide from its constituent elements:…

A: According to the question, The reaction is given as, N2g+O2g → 2NOg∆Hr = 182.6 kJ/mol   Find the…

Q: A piece of metal with a specific heat of 1.153 J/gºC is heated to 124.6ºC and then placed in 120.382…

A: