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13 Dec 2019

Given 4Fe(s) + 3(O2)(g) -> 2 Fe2O3

(Change in Enthalpy for 2 Fe2O3 is -822.2 kj/mol)

what mass of iron must react to raise the temperature of 40.0 grams of water from 0.0 degrees celsius to 48.0 degrees celsius? The specific hear of water is 4.184 J/(gC)

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17 Dec 2019

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1. A 500 gram sample of hot mythril ore is submerged in a cold water bath. If the water experienced a change in heat of -58 kJ and the mythril ore experienced a temperature change of 4 kelvin, what must the specific heat capacity of the ore be? Have answer in units of J/g x degrees Celsius & show steps.

a. -0.43 J/g x degrees Celsius

b. -29 J/g x degrees Celsius

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2. The following hypothetical circumstance takes place in a coffee-cup calorimeter. Dissolving 3 moles of a salt in 100 grams of water causes the temperature of the water to increase by 3 degrees Celsius. What is the enthalpy of this reaction? The specific heat capacity of water is 4.184 J/g x degrees Celsius

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b. -225.9 kJ/mol

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Each photon generated in a microwave oven has a wavelength of 0.0155m. How many photons must be absorbed by 8 ounces of water to raise the temperature from 20 degrees Celsius to 98 degrees Celsius? Density of water is 1.0g/mL, 1 ounce = 30 mL, and specific heat capacity, c=4.184 J/gC.

The answer is 6.1 x 10^27, but I am so confused on how to do this problem.

A 0.250 gram chunk of sodium metal is cautiously dropped into amixture of 50.0 grams of water and 50.0 grams of ice, both at 0degress celsius. The reaction is

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Given 4Fe(s) + 3(O2)(g) -> 2 Fe2O3

(Change in Enthalpy for 2 Fe2O3 is -822.2 kj/mol)

what mass of iron must react to raise the temperature of 40.0 grams of water from 0.0 degrees celsius to 48.0 degrees celsius? The specific hear of water is 4.184 J/(gC)

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Given 4Fe(s) + 3(O2)(g) -> 2 Fe2O3 (Change in Enthalpy for 2 Fe2O3 is -822.2 kj/mol) what mass of iron must react to raise the temperature of 40.0 grams of water from 0.0 degrees celsius to 48.0 degrees celsius? The specific hear of water is 4.184 J/(gC)

Unlock all answers

Related textbook solutions

Basic Chemistry

Principles of Chemistry Molecular Approach

Principles of Chemistry Molecular Approach

Chemistry: Structure and Properties

Chemistry: A Molecular Approach

Chemistry: A Molecular Approach

Principles of Chemistry: A Molecular Approach

Chemistry: The Central Science

Related questions

Weekly leaderboard

Given 4Fe(s) + 3(O2)(g) -> 2 Fe2O3

(Change in Enthalpy for 2 Fe2O3 is -822.2 kj/mol)

what mass of iron must react to raise the temperature of 40.0 grams of water from 0.0 degrees celsius to 48.0 degrees celsius? The specific hear of water is 4.184 J/(gC)