Recent questions in Chemistry

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Calculate the heat required to raise the temperature of 100.0 grams of water from 25°C to 50°C if the specific heat capacity of water is 4.184 J/g°C.

asked Jan 23 in ThermoChemistry by ReinaldoMunz (1.2k points)

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1 answer 55 views

Calculate the heat released when 50 ml of 0.1 M HCl is neutralized with 50 ml of 0.1 M NaOH, assuming that the specific heat capacity of the mixture is 4.18 J/g°C and the density of the final solution is 1.0 g/mL.

asked Jan 23 in ThermoChemistry by Hanna191905 (2.0k points)

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1 answer 70 views

Calculate the heat released when 300 mL of water at 20°C is mixed with 200 mL of ethanol at 25°C. The specific heat capacity of water is 4.18 J/g°C, the specific heat capacity of ethanol is 2.44 J/g°C, and the heat of mixing for water and ethanol is approximately -21 kJ/mol. Assume that both water and ethanol have a density of 1 g/mL and that the final temperature of the mixture is 22°C.

asked Jan 23 in ThermoChemistry by MorrisMcGahe (1.7k points)

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Calculate the heat released when 10.0 g of solid NaOH at 25.0°C is dissolved in 200.0 mL of water also at 25.0°C, given that the heat of crystallization of NaOH is 44.5 kJ/mol and the density of water is 1.00 g/mL.

asked Jan 23 in ThermoChemistry by DanClay0864 (2.1k points)

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1 answer 75 views

Calculate the heat released when 1 mole of ethane (C2H6) is combusted in oxygen gas to form carbon dioxide and water, given the following enthalpy of combustion values: ΔH°comb(C2H6) = -1560 kJ/mol ΔH°comb(O2) = -393.5 kJ/mol ΔH°f(CO2) = -393.5 kJ/mol ΔH°f(H2O) = -285.8 kJ/mol

asked Jan 23 in ThermoChemistry by GingerJ92570 (1.6k points)

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1 answer 67 views

Calculate the heat of sublimation of solid carbon dioxide (dry ice) given that the enthalpy of fusion of solid carbon dioxide is 8.6 kJ/mol and the enthalpy of vaporization of carbon dioxide gas is 22.8 kJ/mol. (Hint: The heat of sublimation of a substance is equal to the sum of its enthalpy of fusion and enthalpy of vaporization.)

asked Jan 23 in ThermoChemistry by Phillipp6306 (2.1k points)

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1 answer 74 views

Calculate the heat of sublimation of solid carbon dioxide (CO2) given that its enthalpy of fusion is 8.44 kJ/mol and its enthalpy of vaporization is 25.2 kJ/mol. The molar mass of CO2 is 44.01 g/mol.

asked Jan 23 in ThermoChemistry by HarryHodgkin (2.2k points)

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1 answer 80 views

Calculate the Heat of Sublimation of iodine (I2) if 20.0 grams of iodine sublimate at standard temperature and pressure (STP) from a solid to a gas phase absorbing 62.30 kJ of heat energy in the process.

asked Jan 23 in ThermoChemistry by SvenJonathan (1.9k points)

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1 answer 61 views

Calculate the heat of sublimation for water when 10 g of ice sublimes at standard conditions (1 atm, 25°C)? Given: Heat of fusion of ice is 6.01 kJ/mol; Heat of vaporization of water is 40.67 kJ/mol.

asked Jan 23 in ThermoChemistry by ClaraCraddoc (1.6k points)

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1 answer 66 views

Calculate the heat of sublimation for iodine if 25 g of iodine is heated from its solid form at -110°C to its gaseous form at 184°C. The molar heat capacity of iodine (s) is 54.44 J mol⁻¹ K⁻¹ and the molar heat capacity of iodine (g) is 36.57 J mol⁻¹ K⁻¹. The molar enthalpy of fusion of iodine is 15.52 kJ mol⁻¹.

asked Jan 23 in ThermoChemistry by EmilySulman6 (2.0k points)

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1 answer 71 views

Calculate the heat of neutralization when 50 mL of 1 M HCl(aq) is mixed with 50 mL of 1 M NaOH(aq) at a constant temperature of 25 °C. The specific heat capacity of the solution is 4.18 J/g·°C, and the density of the solution is 1.00 g/mL.

asked Jan 23 in ThermoChemistry by Hanna191905 (2.0k points)

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1 answer 52 views

Calculate the heat of neutralization for the reaction of 50 mL of 2.0 M hydrochloric acid and 50 mL of 2.0 M sodium hydroxide. The specific heat capacity of the solution is 4.18 J/g°C and the temperature change is 10°C.

asked Jan 23 in ThermoChemistry by JackQ7308746 (2.0k points)

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1 answer 64 views

Calculate the heat of mixing when 50g of ethanol (C2H5OH) is added to 200g of water initially at 25°C. Assume the density of water is 1g/mL and the specific heat capacity of water is 4.184J/(g°C). The enthalpy of vaporization of ethanol is 38.56kJ/mol and assume that ethanol-water mixture has a specific heat capacity of 4.2J/(g°C).

asked Jan 23 in ThermoChemistry by AshleighTheo (1.8k points)

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1 answer 61 views

Calculate the heat of mixing when 50.0 mL of 1.00 M HCl is added to 50.0 mL of 1.00 M NaOH at 25°C. The heat capacity of the solution is 4.18 J/(g·°C) and the density of the final solution is 1.00 g/mL. Assume that the heat change is equal to the enthalpy change.

asked Jan 23 in ThermoChemistry by EvieOconnor (2.3k points)

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1 answer 60 views

Calculate the heat of mixing when 50 mL of 0.1 M HCl is mixed with 50 mL of 0.1 M NaOH at 25°C. The heat of neutralization for HCl and NaOH is -57.5 kJ/mol.

asked Jan 23 in ThermoChemistry by JEAMolly3713 (2.3k points)

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1 answer 69 views

Calculate the heat of mixing when 25.0 mL of 0.50 M HCl solution is added to 25.0 mL of 0.50 M NaOH solution at 25 °C. The heat capacity of the resulting solution is 4.18 J/g°C and the density is 1.00 g/mL. Assume the heat of reaction is constant at 57.1 kJ/mol.

asked Jan 23 in ThermoChemistry by JeroldSterne (1.9k points)

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1 answer 63 views

Calculate the heat of mixing when 25 grams of ethanol is added to 75 grams of water at 25°C. The heat of mixing of ethanol in water is -4.4 kJ/mol. Assume the densities of ethanol and water to be 0.789 g/mL and 1 g/mL, respectively, and the specific heat of the mixture to be 4.184 J/g°C.

asked Jan 23 in ThermoChemistry by ClementMackr (2.5k points)

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1 answer 59 views

Calculate the heat of mixing when 100 mL of 1.0 M HCl is mixed with 100 mL of 1.0 M NaOH at 25°C. The specific heat of the resulting solution is 4.18 J/g°C and the final temperature of the solution is 30°C. Assume the heat capacities of HCl, NaOH, and water are negligible.

asked Jan 23 in ThermoChemistry by EloiseLoxton (1.7k points)

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1 answer 16 views

Calculate the heat of mixing when 100 mL of 0.2 M HCl is mixed with 100 mL of 0.1 M NaOH, assuming that the density of the resulting solution is 1 g/mL and the specific heat capacity is 4.18 J/g℃.

asked Jan 23 in ThermoChemistry by MargueriteWa (1.8k points)

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1 answer 71 views

Calculate the heat of mixing when 100 mL of 0.1 M HCl is mixed with 200 mL of 0.2 M NaOH at 25°C. The specific heat of the solution is 4.18 J/g°C and the density of the solution is 1.00 g/mL. Assume that the heat capacity of the solution is equal to that of pure water.

asked Jan 23 in ThermoChemistry by BrittSalas76 (1.8k points)

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