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0
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1
answer
31
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What is the amount of heat released when burning 5.00 grams of methane (CH4) in excess oxygen under standard conditions?
asked
Mar 1
in
Physical Chemistry
0
votes
1
answer
36
views
What is the amount of heat released when 2.5 moles of propane (C3H8) is completely burned in oxygen gas (O2) according to the balanced equation: C3H8 + 5O2 → 3CO2 + 4H2O given that the standard enthalpy of combustion of propane is -2220 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
32
views
What is the amount of heat needed to melt 25 grams of ice at its melting point if its enthalpy of fusion is 6.02 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
26
views
What is the amount of heat involved in the neutralization of 25.0 mL of 0.1 M HCl with 25.0 mL of 0.1 M NaOH, given the heat of neutralization of HCl and NaOH to be -57.1 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
37
views
What is the amount of heat energy required to vaporize 50 grams of water at its boiling point of 100°C, given that the enthalpy of vaporization of water is 40.7 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
35
views
What is the heat capacity of a 50 g copper block when heated from 25°C to 95°C, given that the specific heat capacity of copper is 0.385 J/g·°C? Calculate the amount of heat energy required to raise the temperature of the copper block by 70°C.
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
40
views
What is the amount of heat energy required to melt 15 grams of ice at 0°C? The enthalpy of fusion of water is 6.01 kJ/mol.
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
33
views
What is the amount of heat energy required to melt 25 grams of ice at 0°C, given that the enthalpy of fusion of water is 6.01 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
35
views
What would be the amount of heat energy required to change 100 grams of ice at -10°C into liquid water at 20°C? Given, the enthalpy of fusion of ice = 6.01 kJ/mol and the specific heat capacity of liquid water = 4.18 J/g°C.
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
35
views
What is the amount of heat absorbed in the process of melting 10 grams of ice at 0°C, given that the enthalpy of fusion of ice is 6.01 kJ/mol? Show the calculations and round off to two significant figures.
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
39
views
What is the amount of heat absorbed by a 50 g sample of water when it is heated from 20°C to 100°C? (Specific heat of water= 4.18 J/g·K)
asked
Mar 1
in
Physical Chemistry
0
votes
1
answer
31
views
What is the amount of heat absorbed by 25 g of ice at -10°C when it is converted to water at 20°C? Given 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
Mar 1
in
ThermoChemistry
0
votes
1
answer
33
views
What is the amount of energy required to vaporize 50 grams of water at its normal boiling point? The enthalpy of vaporization of water is 40.7 kJ/mol.
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
32
views
What is the amount of energy required to vaporize 50 grams of water at its boiling point, given that the enthalpy of vaporization of water is 40.7 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
39
views
What is the amount of energy required to melt 50 grams of ice at 0°C, given that the heat of fusion of ice is 333.55 J/g?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
41
views
What is the activation energy of the following chemical reaction: 2H2O2(aq) → 2H2O(l) + O2(g)? Use the experimental data provided to calculate the activation energy in Joules per mole.
asked
Mar 1
in
Chemical reactions
0
votes
1
answer
31
views
What is the activation energy for the reaction between 2 M of HCl and 2 M of NaOH at a temperature of 25°C when a voltage of 1.5 V is applied?
asked
Mar 1
in
ElectroChemistry
0
votes
1
answer
28
views
What is the activation energy for the oxidation of hydrogen gas at a Pt electrode, where the overpotential is 100 mV and the current density is 0.5 mA/cm2?
asked
Mar 1
in
ElectroChemistry
0
votes
1
answer
31
views
What is the activation energy for the oxidation of copper in a 1 M copper sulfate solution with a standard reduction potential of +0.34 V at 298 K, given that the exchange current density is 5.6 x 10^-6 Acm^-2 and the reaction order is unity?
asked
Mar 1
in
ElectroChemistry
0
votes
1
answer
33
views
What is the activation energy for the electrochemical reaction that occurs when zinc metal is oxidized to form Zn2+ ions in a solution containing HCl? Calculate the activation energy at 25°C from the experimental data obtained from the Tafel plot.
asked
Mar 1
in
ElectroChemistry
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