A chunk of zinc weighing 18.6 grams and originally at 98.82 °C is dropped into an insulated cup containing 77.9 grams of water at 21.22 °C.

Q: How many grams of solid water can be melted with 1.55kJ of energy?

A: Given: Molar heat of fusion of water(∆Hfus ) = 6.01 kJ/mol  Heat energy(q) = 1.55 kJ

Q: styrofoam cup used instead of a beaker?

A: The molar heat of fusion is quantity of heat required to change 1g of solid to liquid without any…

Q: ACTIVITY: 5 grams of an unknown compound was dissolved in 75 ml of water with an initial temperature…

A: Given: Weight of water = 75 ml = 75 grams Initial temperature (T1) = 22.5°C Final temperature (T2) =…

Q: A cylinder of oxygen is cooled from 27oC to -123oC. By what factor does the average kinetic energy…

A: Recall the following expression of kinetic energy (E) of a gaseous system…

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A: The chemical reaction in which one mole of a substance is formed by the elements in their standard…

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A:

Q: At high temperatures, glass has a tendency to change its shape into a sphere. Assume that the…

A:

Q: 3Ag* (aq) + Cr (s) → 3 Ag (s) + Cr3+ (aq) Ag*(ag) + 1 e¨ → Ag (s) Cr3+(ag) + 3 e 0.80 V → Cr (s).…

A: The given cell reaction is:3 Ag+ (aq) + Cr (s) → 3 Ag (s) + Cr3+ (aq)The cell is represented…

Q: What is the final temperature of 100.0 g of zinc at 95°C put into 50.0g of water at 17°C.  Specific…

A: Given data,Mass of Zn=100 gMass of H2O=50 gInitial temperature of Zn=95oCInitial temperature of…

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A: When we heat hydrated salt we get anhydrous salt.  From the values of mass of anhydrous salt and…

Q: Answer all questions with detailed answers on paper. a) Hydrogen gas burns in air to form water.…

A: a) Hydrogen gas burns in air to form water. 2 H2(g) + O2(g) → 2 H2O(l) ΔН = -527 kJ The heat energy…

Q: A typical candy bar weighs about 2 oz (1.00 oz = 28.4 g).(a) Assuming that a candy bar is 100% sugar…

A: a.) Given: Weight of candy bar is 2 oz. 1.0 g sugar is equivalent to 4.0 calorie energy.…

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

A: Given,

Q: A gas sample initially at 1.75 atm increases in pressure to 4.51 atm as the volume shrinks to 6.8 L.…

A:

Q: Use the References to access important values if needed for this question. Thermometer When a solid…

A: Number of moles of NH4Br can be calculated as follows,

Q: A 31.5 g wafer of pure gold initially at 69.8°C is submerged into 63.4 g of water at 27.8 °C in an…

A: q = c*m*∆T q = heat  c = specific heat capacity m is the mass of substance ∆T is the change in…

Q: Calculate the theoretical volume yeild (In mL) of oxygen gas produced at STP conditions, when 0.920g…

A: Interpretation - To determine the theoretical volume yield of ( in mL ) of oxygen gas which is…

Q: Energy 1:Question 1 What is a difference between a 90°C cup of water and a 40°C cup of water? Assume…

A: Temperature is the measure of the hotness of a system. Hotter is the system , more will be the…

Q: In the process illustrated by the pV diagram in (Figure 1), the temperature of the ideal gas remains…

A: (a) At b: Pressure = 0.200 atm Volume= 0.100m3  = 100L Temperature = 147°C = 420K Using Ideal gas…

Q: of the calorimeter is determined by its design in terms of the three mechanisms of heat transfer…

A: Conduction: This mode of heat transfer occurs when solid materials or object are the medium of heat…

Q: A typical frostless refrigerator uses 655 kWh of energy per year in the form of electricity. Suppose…

A: Calculate the standard change in enthalpy  for the combustion of C Use standard enthalpies of…

Q: 8. A student obtained the following graph with their data from lab 16. Use the graph to find the…

A: The clausius clapeyron equation is:

Q: 22. How many calories of energy are needed to raise the temperature of 87.g of water from 0 to 212…

A: The heat required to raise the temperature of the substance is directly proportional to the…

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: 2 NH4CIO4(s)→ N₂(g) + Cl₂(g) + 2 O2(g) + 4 H₂O(g) AH = -375.6 kJ The enthalpy of formation of H₂O(g)…

A:

Q: What is the final temperature (in °C) if 4.50 L of helium at 35 °C is cooled until the volume…

A: Given, Initial volume of Helium , V1= 4.5 L Initial temperature, Ti= 35°C=(35+273)K=308 K Final…

Q: Volume of acetic anhydride: 2.98 mL Mass of salicylic acid: 1.00 g Mass of aspirin recovered: 0.67…

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Q: draw a diagram of Hydrogen gas being produced by water electrolysis to increase the biogas produced…

A:

Q: If 10.7 kJ of heat were added to 468 g of liquid water at 30.°C, how much would its temperature…

A: Heat in kilojoules can be calculated using the specific heat capacity, temperature difference and…

Q: Consider a container with thick rigid metal walls (i.e, the volume does not change) that is filled…

A: When the air is cooled from room temperature to -78 °C the kinetic of energy of the molecule starts…

Q: How much energy is required to raise the temperature of 11.9 grams of solid iodine from 21.8 °C to…

A:

Q: A 5.90-g chunk of potassium is dropped into 1.00 kg water at 24.7°C. What is the final temperature…

A: 1.A 5.90-g chunk of potassium is dropped into 1.00 kg water at 24.7°C. 2. Tobfind out the final…

Q: 90.0 g of water at 15.0 ∘C

A:

Q: How many joules of heat is needed to heat a 108 grams of Aluminum foil from 13°C to 65°C if aluminum…

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Q: Work equals mass times distance.     Question 19 options:   True   False

A: The statement in question is 'Work equals mass times distance'. To evaluate the truthfulness of this…

Q: The total volume of hydrogen gas needed to fill the Hindenburg was 2.0 x 108 L at 1.0 atm and 25°C.…

A: Given, The balanced chemical equation, H2(g) + O2(g) ---> 2H2O P = 1.0 atm V = 2.0 x 108 L T =…

Q: Write a balanced chemical equation for the standard formation reaction of solid potassium…

A: Standard formation reaction of any substance is the reaction in which 1 mole of substance is formed…

Q: 84 of lead at 108.106°C is put into 72.889 g of water at 1.247°C. What is the final temperature in…

A: Mass of Lead = 84 g.Initial temperature of Lead = 108.106 oC.Mass of water = 72.889 g.Final…

Q: Consider the following reaction between nitrogen and hydrogen gases. N2(g)+ 2H2(g) → N2H4(9) AH =…

A: Given that, the reaction is:

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: Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 323. kJ during a…

A: The enthalpy change of the given reaction is = -323. kJ The work done by the gas mixture is =-162.…

Q: A gas is collected over water, and it contains 70.4 atm of oxygen, 456.3 atm of helium, and 4.32 atm…

A: NOTE : Since there is no temperature and vapour pressure data of water given in the question. Hence…

Q: The pressure of a gas is measured as 60. torr. Represent this pressure in atmospheres

A: We have to convert 60 torr pressure to pressure in atm  Given 1 atm = 760 torr)