Recent questions in Chemistry

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Calculate the amount of heat required to melt 25 grams of ice at 0°C. The enthalpy of fusion of ice is 6.01 kJ/mol.

asked Jan 23 in ThermoChemistry by EarthaGreenh (210 points)

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Calculate the amount of heat required to melt 20 grams of ice at 0°C and convert it to liquid water at 0°C. The enthalpy of fusion of water is 6.01 kJ/mol. Show all the steps of your calculations.

asked Jan 23 in ThermoChemistry by RalphBello37 (550 points)

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Calculate the amount of heat required to break all the bonds in 5 moles of carbon dioxide using the bond energy values for the C=O bond and the O-H bond.

asked Jan 23 in Chemical reactions by ClaudiaChamb (290 points)

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Calculate the amount of heat released when 50 grams of NaOH is dissolved in 500 mL of water at 25°C. The heat of crystallization of NaOH is -44.51 kJ/mol. Assume the final temperature of the solution is 25°C and the heat capacity of the solution is 4.18 J/g °C.

asked Jan 23 in ThermoChemistry by JermaineMaue (450 points)

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Calculate the amount of heat released when 25 g of NaCl is crystallized from a solution at its saturation point. The heat of crystallization of NaCl is -788 J/g.

asked Jan 23 in ThermoChemistry by PartheniaF00 (390 points)

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Calculate the amount of heat released when 10.0 g of methane gas (CH4) is burned in excess oxygen at constant pressure, given that the enthalpy of combustion of methane is -890.3 kJ/mol.

asked Jan 23 in Physical Chemistry by Margarita30G (210 points)

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Calculate the amount of heat released when 10.0 g of methane (CH4) is burned completely in excess oxygen if the enthalpy of combustion of methane is -890 kJ/mol.

asked Jan 23 in Physical Chemistry by KPUKarolyn5 (330 points)

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1 answer 51 views

Calculate the amount of heat released when 0.5 moles of propane, C3H8, combust completely in oxygen gas, O2, according to the following balanced equation:C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(l), ∆H = -2220 kJ/mol.

asked Jan 23 in ThermoChemistry by RodrickWilsh (350 points)

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Calculate the amount of heat energy required to melt 25 grams of ice at 0°C, given that the enthalpy of fusion of ice is 6.01 kJ/mol.

asked Jan 23 in ThermoChemistry by WilliamsDeco (210 points)

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Calculate the amount of heat energy required to melt 20 grams of ice at 0°C and determine the final temperature of the resulting water if the enthalpy of fusion of ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/(g·°C).

asked Jan 23 in ThermoChemistry by EloisaStrehl (450 points)

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Calculate the amount of heat energy released when 50 mL of 1 M hydrochloric acid (HCl) is mixed with 50 mL of 1 M sodium hydroxide (NaOH) solution. The heat of neutralization for the reaction between HCl and NaOH is -57.1 kJ/mol.

asked Jan 23 in ThermoChemistry by EzekielMock0 (330 points)

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Calculate the amount of heat energy needed to melt a 25-g ice cube at its melting point of 0°C. The enthalpy of fusion of water is 6.01 kJ/mol.

asked Jan 23 in ThermoChemistry by AlvaroZyl417 (410 points)

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Calculate the amount of heat absorbed when 32 grams of ice at -10°C melts into water and then further heated to 35°C. (Given: Enthalpy of fusion of ice = 6.01 kJ/mol and specific heat of water = 4.18 J/g°C)

asked Jan 23 in ThermoChemistry by IngridMarcha (510 points)

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1 answer 42 views

Calculate the amount of heat absorbed when 20 grams of ice at -10°C is melted and then warmed to 30°C. The specific heat of ice is 2.09 J/g°C, the specific heat of water is 4.18 J/g°C and the enthalpy of fusion of ice is 6.01 kJ/mol.

asked Jan 23 in ThermoChemistry by SofiaBrunson (370 points)

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Calculate the amount of heat absorbed or released when 50 grams of NaCl crystals at 25°C are dissolved in 200 grams of water at the same temperature. Given the enthalpy of crystallization of NaCl is -787 kJ/mol and the specific heat capacity of water is 4.18 J/g°C.

asked Jan 23 in ThermoChemistry by EloisePearsa (270 points)

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1 answer 45 views

Calculate the amount of heat absorbed or released when 20 grams of dry ice (solid carbon dioxide) is converted to gaseous carbon dioxide at -78.5°C and atmospheric pressure, given the heat of sublimation of dry ice is 25.2 kJ/mol.

asked Jan 23 in ThermoChemistry by MarianoPento (290 points)

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1 answer 48 views

Calculate the amount of heat absorbed or released when 2.5 moles of sodium acetate (NaCH3COO) is crystallized from its solution at a constant temperature of 25°C. The heat of crystallization for sodium acetate is -427 kJ/mol.

asked Jan 23 in ThermoChemistry by RyanAskins6 (650 points)

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Calculate the amount of heat absorbed by 50 grams of water during the process of crystallization when it is cooled from 70°C to 0°C and solidifies into ice with a heat of crystallization of 333.55 J/g.

asked Jan 23 in ThermoChemistry by NydiaAngulo5 (310 points)

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1 answer 45 views

Calculate the amount of heat absorbed (in joules) when 10 grams of sodium hydroxide (NaOH) is dissolved in 100 mL of water at 25°C, given that the enthalpy of solution for NaOH is -44.51 kilojoules per mole.

asked Jan 23 in ThermoChemistry by Sharyl671254 (330 points)

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1 answer 57 views

Calculate the amount of heat (in joules) released when 50 ml of 0.1 M hydrochloric acid (HCl) is mixed with 50 ml of 0.1 M sodium hydroxide (NaOH) at a constant pressure and a temperature of 25°C. The heat of neutralization of HCl and NaOH is -57.1 kJ/mol.

asked Jan 23 in ThermoChemistry by ChristianeL6 (410 points)

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