Recent questions in Chemistry

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What is the heat required to sublime 30 grams of dry ice (CO2) at a constant pressure of 1 atm? The heat of sublimation of CO2 is 25.2 kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat required to sublimate 55 grams of dry ice (CO2) at -78.5°C and atmospheric pressure? The heat of sublimation of CO2 is 25.2 kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat required to raise the temperature of 75 g of water from 25°C to 90°C? Given that the specific heat capacity of water is 4.18 J/g°C.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat required to raise the temperature of 50 grams of water by 10 degrees Celsius? The specific heat capacity of water is 4.18 J/g °C.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat required to raise the temperature of 50 grams of water by 10 degrees Celsius if the specific heat capacity of water is 4.184 J/g*C?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat required to raise the temperature of 50 grams of water from 20°C to 50°C, given that the heat capacity of water is 4.184 J/g°C?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat released or absorbed when 50 g of water freezes to ice at -10°C, given that the heat of crystallization for water is 6.01 kJ/mol?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat released or absorbed when 2 moles of hydrogen gas reacts with 1 mole of oxygen gas to form 2 moles of water vapor at constant volume? The enthalpy change for this reaction is -483.7 kJ/mol.

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

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What is the heat released or absorbed when 50 grams of methane ($CH_{4}$) is burnt completely in oxygen ($O_{2}$) at a constant pressure of 1 atm? The heat of combustion of methane is -890.4 kJ/mol.

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

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If 2.50 moles of propane react with excess oxygen gas, how much heat is released at constant pressure if the enthalpy change of the reaction is -2044 kJ/mol?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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How much heat is released when 20 grams of methane (CH4) undergoes complete combustion?

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What is the heat released during the combustion of 5 grams of propane (C3H8) at constant volume, given that the enthalpy change of combustion of propane is -2220 kJ/mol?

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

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What is the heat of sublimation of iodine, given that it has a vapor pressure of 10 mmHg at -10°C and a normal boiling point of 184.35°C?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat of sublimation of dry ice (CO2) when 60 grams of it is sublimated at a constant pressure of 1 atm? The initial temperature of dry ice is -78.5°C and its final temperature is -56.6°C.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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1 answer 37 views

What is the heat of sublimation of carbon dioxide (CO2) if 50 g solid CO2 is completely converted into gas phase without changing the temperature and pressure conditions? Given: The molar heat of sublimation of CO2 is 25.2 kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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1 answer 30 views

What is the heat of sublimation for solid carbon dioxide (dry ice) if 100 grams of it sublimes at a constant pressure of 1 atm and absorbs 25.2 kJ of heat?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat of neutralization for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) when 50 mL of 2 M HCl is mixed with 50 mL of 2 M NaOH in a calorimeter and the temperature increases from 25°C to 31°C?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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1 answer 28 views

What is the heat of neutralization of sulfuric acid (H2SO4) with sodium hydroxide (NaOH) at constant pressure if 50 mL of 2.0 M H2SO4 is reacted with 50 mL of 2.0 M NaOH?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat of neutralization of hydrochloric acid (HCl) and sodium hydroxide (NaOH) when 50 mL of 2.0 M HCl is reacted with 50 mL of 2.0 M NaOH, given that the initial and final temperatures of the solution are 25°C and 39°C, respectively?

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the heat of neutralization when 50 mL of 2.0 M hydrochloric acid reacts with 50 mL of 2.0 M sodium hydroxide solution? The specific heat capacity of the solution is 4.18 J/g °C, and the temperature change is recorded as 8.2 °C during the reaction.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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