Dry chemical hand warmers utilize the oxidation of iron to form iron oxide according to the following reaction: 4Fe(s) + 302(g) → 2F€2O3(s) Standard thermodynamic quantities for selected substances at 25 °C Reactant AH; (kJ/mol) ΔΗ or product Fe(s) 0.0 O2 (g) 0.0 Fe2O3 (s) -824.2 |

Q: The specific heat of a substance is the amount of heat required to raise the temperature of one gram…

A: Given, the mass of substance =45.2 graminitial temperature =29.4 °Cfinal temperature =66.8 °Camount…

Q: If 11.96 kJ of heat is given off when 41.9 g of unknown acid condenses from vapor to liquid, what is…

A: Given data : 11.96KJ  Given mass of unknown acid-41.9g Molar mass of unknown mass 49.15g/mol

Q: For the following thermochemical equation, CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)        ΔH = –890 kJ…

A: Given reaction: CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l). ∆H = -890 kJ. So, 890 kJ of heat is released…

Q: A 92.9-g piece of a silver/gray metal is heated to 178.0 °C, and then quickly transferred into 75.0…

A: C is the symbol for specific heat capacity of a substance and equal to the amount of substance in…

Q: A  55.2 g piece of metal has a temperature of 90.4 °C before being placed into 102.5 g of water at…

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Q: A piece of unknown solid substance weighs 437.2 g, and requires 8460 J to increase its temperature…

A: In this question, we want to determine the specific heat of the unknown substance.  You can see…

Q: Benzene  is burned in oxygen. Write the balanced chemical question. Calculate the change in heat of…

A: Given ,Benzene is burned in oxygen.Objective :Write the balanced chemical equation.Calculate heat of…

Q: The table lists the specific heat values of several substances. Substance Specific heat (cal/g.°C)…

A: Heat energy is given by q = m * C * ΔT where q = heat energy m = mass of the substance C = specific…

Q: A 10.0 g piece of metal is heated to 80.0 ° C and placed in 100 g of 23 ° C water. When the system…

A: Specific heat of metal = 0.37  J g-1 oC

Q: How many kilojoules of heat energy are going to be absorbed by a pot of water with the mass of 200.…

A: q = mc∆T  q is the amount of heat energy absorbed m is the mass of substance  c is the specific heat…

Q: It was determined that: 135 J of heat is required to increase the temperature of 10.0 g of an…

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Q: How many grams of water at 20.6 °C  must be mixed with 181 g  of coffee at 96.2 °C so that the…

A: The problem is asking us to find the mass of water needed to mix with coffee to achieve a certain…

Q: How much heat is needed to raise the temperature of 91.0  g of water from 34.0 °C to 98.0 °C?

A: Mass of water, m =91.0  g Initial temperature, T1=34.0 °C Final temperature, T2=98.0 °C Specific…

Q: what is ΔHcond for this substance

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Q: Propane, C3H8(g), is used in many instances to produce heat by burning: C3H8(g) + 5O2(g) → 3CO2(g)…

A: Given :-  C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)      ΔH = -2220. kJ  To calculate :-  Mass of O2…

Q: If 1495 J of heat is needed to raise the temperature of a 333 g sample of a metal from 55.0°C to…

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Q: Hydrogen gas reacts with oxygen to form water.…

A: Hydrogen reacts with oxygen to form water. The equation for the balanced chemical reaction is as…

Q: A calorimeter has a negligible heat capacity. It contains 52.3 g of water initially at 22.4 Celsius.…

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Q: An iron bar of mass 869 g cools from 90.0°C to 8.0°C. Calculate the metal's heat change (in…

A: For this question, we apply the equation: Q = mCp ΔT

Q: Duncan knows that it takes 36400 cal of energy to heat a pint of water from room temperature to…

A: for 1 pint of water energy absorbed = 36400cal 1 cal = 4.184 x 10 -3 kJ  so 36400 cal  = 36400 x…

Q: When hydrogen and oxygen are burned to produce water, heat is produced at the rate of 58 kcal/mole…

A: Given, 1 mol H2O = 6.022 ×1023 molecules  Heat produced = 58 Kcal/mol

Q: Calculate the moles of lithium from its molar mass and the heat produced when it reacts with water.…

A: In this scenario, we are presented with a multi-step problem that involves the reaction of lithium…

Q: 2. A piece of a metal with an unknown identity has a mass of 23.8 g. The sample is heated to 125°C…

A: Mass of metal = 23.8 g Temperature = 125 0C mass of water = 50 g Initial temperature = 24 0C Final…

Q: 1.5 L of water is heated from 22.4°C to 98.5°C to make a cup of tea. How much heat in megajoules…

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Q: One mole of calcium oxide reacts with carbon to form calcium carbide (CaC2) and carbon monoxide…

A: the detailed answer is attached below.

Q: What quantity of heat (in kJ) will be absorbed by a 50.3 g piece of aluminum (specific heat = 0. as…

A: The formula to calculate the heat absorbed or released by a substance when it changes temperature is…

Q: 3. A piece of unknown metal with a mass of 17.19 g is heated to 100.00 °C and is dropped into 25.00…

A: Amount of heat absorbed or gained  = Mass x specific heat x change in temperature

Q: A piece of metal with a specific heat of 1.09 J/gºC is heated to 108ºC and then placed in 139.785 g…

A: Given that: Mass of water = 139.785 gInitial temperature of water = 1.7oCFinal temperate of water…

Q: Determine the amount of heat (in kJ) given off when 2.48×104g of NO2 is produced according to the…

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

Q: The molar heat of solution (AH,0ln) of sodium hydroxide is -445.1 kJ/mol. In a certain experiment,…

A: Molar heat of solution is defined as the energy released or absorbed per mole of solute being…

Q: A sample of silver metal is heated to 100.1 °C in a hot water bath until thermal equilibrium is…

A: Given that: mass of water = 52.483 g initial temperature of metal  = 100.1 °C final temperature of…

Q: In the laboratory a student finds that it takes 62.4 calories to increase the temperature of 15.0…

A: Given :-  Heat absorbed = 62.4 cal  Mass of Mg = 15.0 g  Initial temperature = 20.9 oC  final…

Q: Substance Z has a specific heat capacity of 0.458 J/g°C Substance Y has a specific heat capacity of…

A: The answer to the following question is given as:

Q: the temperature of a silver coin decreases by 353°c as it releases 5,550 joules of heat. what is the…

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Q: To treat a burn on his hand, a person decides to place an ice cube on the burned skin. The mass of…

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Q: Calculate the amount of heat required to raise the temperature of an 91g sample of water from 39 ∘C…

A: The heat required to raise the temperature of a substance can be expressed as:

Q: A hot 105.9 g lump of an unknown substance initially at 154.0 °C is placed in 35.0 mL of water…

A: The objective of the question is to identify the unknown substance by using the principle of…

Q: If 1495 J of heat is needed to raise the temperature of a 327 g sample of a metal from 55.0°C to…

A: The weight of metal is 327 g.The given temperature values are 55.0 ˚C and 66.0 ˚C. The value of q is…

Q: calculate the specific heat (J/goC) of platinum

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Q: A 234.66 gram aqueous solution has a specific heat of 4.186 J/gºC. The solution is at 28.1 °C. What…

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Q: Calculate the quantity of heat absorbed by 30.0 g of water when its temperature is raised to 67.9…

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Q: A 25.09 g sample of a substance is initially at 24.0 °C. After absorbing 2121 J of heat, the…

A: Interpretation- To determine the specific heat of the substance for  25.09 g sample of a substance…