Which substance will gain the greatest amount of heat when 1.00 mol is melted? Substance Melting...
Which substance will gain the greatest amount of heat when 1.00 mol is melted?
| Substance | Melting Point (C) | Heat of Fusion (kj/mol) |
|---|---|---|
| NaOH | 318 | -427 |
| NaCl | 801 | -411 |
| H3PO4 | 158 | -1279 |
| MgCO3 | 540 | -1113 |
Homework Answers
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Which substance will gain the greatest amount of heat when 1.00
mol is melted?
Substance
Melting...
The change in enthalpy when 1 mol of ice is melted at 273K is 6008 J Heat Capacity of liquid water, Cp_{L} = 75.44 J/mol K Heat Capacity of solid water, Cp_{S} = 38J/mol K Enthalpy chage of melting at...
The change in enthalpy when 1 mol of ice is melted at 273K is 6008 J Heat Capacity of liquid water, Cp_{L} = 75.44 J/mol K Heat Capacity of solid water, Cp_{S} = 38J/mol K Enthalpy chage of melting at 273K, \Delta H_{273}=6008 J Calculate the standard enthalpy of fusion for ice. Calculate the heat released when 100 g of water supercooled at 250K solidify Initial T=25°C=298K Thanks
Which of the following 10.0 gram substances will increase in temperature by the greatest amount when 100 J of hea...
Which of the following 10.0 gram substances will increase in temperature by the greatest amount when 100 J of heat is added to each? Substance D, specific heat 1.67 J/(g°C) Substance C, specific heat 1.22 J/(g°C) Substance A, specific heat 1.06 J/(g°C) Substance B, specific heat 0.892 J/(g°C) Given that the enthalpy of formation, AH, of gaseous nitrogen dioxide is +33.84 kJ/mol, what is the enthalpy change for the following reaction? 2NO2(g) N2(g)202(g) AH= ? -33.84 kJ +67,68 kJ -67.68...
Which of the following statements is FALSE? O When a substance melts, some - but not...
Which of the following statements is FALSE? O When a substance melts, some - but not all-of the intermolecular forces are disrupted O When a substance evaporates, all of the intermolecular forces are disrupted O A compound with stronger intermolecular forces will have a higher boiling point The enthalpy of sublimation is less than the enthalpy of vaporization but more than the enthalpy of fusion O The enthalpy of vaporization for a compound is greater than the enthalpy of fusion...
if the same amount of heat is added to 1.00 g of each substances which substance...
if the same amount of heat is added to 1.00 g of each
substances which substance will undergo the largest temperature
change
Pb.2. When MgSO. dissolves in water, the temperature of the solution increases. Fill out the following blanks about this reaction. The reaction of dissolution of MgSO4 is (exothermic or endothermic) The sign of AH for this reaction of dissolution is _(positive or negative) The sign of the quantity of heat of the solution, qol, is (positive or negative)...
Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol)...
Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol) Fe(s) 111.5 0.449 1. Fill in the empty entries in the table above. 2. If the same amount of energy is transferred to 1.0 g samples of each of the substances listed above, order them from largest AT to smallest AT. Explain. 3. Which is the consequence of copper's relatively low specific heat (0.385 J/(g°C)) compared to water (4.18 J/(g°C)) on the temperature change...
Chemistry 1516R Problem Set QUESTIONS For water, the molar heat of fusion is 6.01 kJ/mol and...
Chemistry 1516R Problem Set QUESTIONS For water, the molar heat of fusion is 6.01 kJ/mol and the molar heat of vaporization is 40.7 kJ/mol. al Calculate the amount of energy needed to melt 52.4g of ice at O'C b Calculate the amount of energy needed to evaporate 52.4 g of water at 100°C c If the specific heats of ice, water, and steam are 2.09.4.18 and 1.84J ' respectively, calculate the energy required to convert 100.0 g of iscat -...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 2000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 1000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
CHAPTER 9 REVIEW QUESTIONS 1How much heat is required to raise the temperature of a 0.04...
CHAPTER 9 REVIEW QUESTIONS 1How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 k/kg-C? 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by a factor of 27 (A) 200J (B) 400 J (C) 600...
(7 pts.) Calculate the heat absorbed when 4.20 g of H2 are produced according to the...
(7 pts.) Calculate the heat absorbed when 4.20 g of H2 are produced according to the following equation. CH3OH (g) → CO(g) + 2 H2(g) AH = 90.2 kJ (7 pts.) When one adds 1.475 kJ of heat energy to a sample of gold, the temperature goes from 12.5 °C to 84.6 °C. Calculate the mass of the sample of gold. Gold has a specific heat capacity of 0.129 J/g.°C. (6 pts.) 10. Write the thermochemical equation for the standard...
Which of the following 10.0 gram substances will increase in temperature by the greatest amount when 100 J of heat is added to each? Substance D, specific heat 1.67 J/(g°C) Substance C, specific heat 1.22 J/(g°C) Substance A, specific heat 1.06 J/(g°C) Substance B, specific heat 0.892 J/(g°C) Given that the enthalpy of formation, AH, of gaseous nitrogen dioxide is +33.84 kJ/mol, what is the enthalpy change for the following reaction? 2NO2(g) N2(g)202(g) AH= ? -33.84 kJ +67,68 kJ -67.68...
Which of the following statements is FALSE? O When a substance melts, some - but not all-of the intermolecular forces are disrupted O When a substance evaporates, all of the intermolecular forces are disrupted O A compound with stronger intermolecular forces will have a higher boiling point The enthalpy of sublimation is less than the enthalpy of vaporization but more than the enthalpy of fusion O The enthalpy of vaporization for a compound is greater than the enthalpy of fusion...
if the same amount of heat is added to 1.00 g of each
substances which substance will undergo the largest temperature
change
Pb.2. When MgSO. dissolves in water, the temperature of the solution increases. Fill out the following blanks about this reaction. The reaction of dissolution of MgSO4 is (exothermic or endothermic) The sign of AH for this reaction of dissolution is _(positive or negative) The sign of the quantity of heat of the solution, qol, is (positive or negative)...
Substance molar heat capacity (C.)/J•mol-1.°C-1 75.3 specific heat capacity (C.) /J•g-lo°C-1 0.384 H2O(1) Cu(s) C,H,OH(l) (ethanol) Fe(s) 111.5 0.449 1. Fill in the empty entries in the table above. 2. If the same amount of energy is transferred to 1.0 g samples of each of the substances listed above, order them from largest AT to smallest AT. Explain. 3. Which is the consequence of copper's relatively low specific heat (0.385 J/(g°C)) compared to water (4.18 J/(g°C)) on the temperature change...
Chemistry 1516R Problem Set QUESTIONS For water, the molar heat of fusion is 6.01 kJ/mol and the molar heat of vaporization is 40.7 kJ/mol. al Calculate the amount of energy needed to melt 52.4g of ice at O'C b Calculate the amount of energy needed to evaporate 52.4 g of water at 100°C c If the specific heats of ice, water, and steam are 2.09.4.18 and 1.84J ' respectively, calculate the energy required to convert 100.0 g of iscat -...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 2000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 1000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
CHAPTER 9 REVIEW QUESTIONS 1How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 k/kg-C? 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by a factor of 27 (A) 200J (B) 400 J (C) 600...
(7 pts.) Calculate the heat absorbed when 4.20 g of H2 are produced according to the following equation. CH3OH (g) → CO(g) + 2 H2(g) AH = 90.2 kJ (7 pts.) When one adds 1.475 kJ of heat energy to a sample of gold, the temperature goes from 12.5 °C to 84.6 °C. Calculate the mass of the sample of gold. Gold has a specific heat capacity of 0.129 J/g.°C. (6 pts.) 10. Write the thermochemical equation for the standard...
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