Homework Answers
Molar mass of Mn = 54.94 g/mol
mass(Mn)= 37.9 g
use:
number of mol of Mn,
n = mass of Mn/molar mass of Mn
=(37.9 g)/(54.94 g/mol)
= 0.6898 mol
For freezing heat is released
Now use:
Q = -Hfus * number of mol
= -14.6 kJ/mol * 0.6898 mol
= -10.07 KJ
Answer: -10.1 KJ
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Use the References to access important values if needed for this question. The following information is...
The following information is given for lead at latm: AH yap(1740 °C) -178 kJ/mol AH fus(328...
The following information is given for lead at latm: AH yap(1740 °C) -178 kJ/mol AH fus(328 °C) = 4.77 kJ/mol boiling point = 1740 °C melting point = 328 °C specific heat solid= 0.130 J/gºC specific heat liquid = 0.138 J/gºC What is AH in kJ for the process of freezing a 26.3 g sample of liquid lead at its normal melting point of 328 °C. The following information is given for silver at latm: AHvap(2212 °C) = 254 kJ/mol...
References) Use the References to access important values if needed for this question. The following information...
References) Use the References to access important values if needed for this question. The following information is given for ethanol, C2HOH, at latm: boiling point 78.4 °C specific heat liquid 2.46 J/g°C AHa(78.4 °C)38.6 kJ/mol At a pressure of 1 atm, kJ of heat are needed to vaporize a 40.4 g sample of liquid ethanol at its normal boiling point of 78.4 °C.
Use the References to access important values if needed for this question. The following information is...
Use the References to access important values if needed for this question. The following information is given for ethanol CH3OH, at latm: AH 2p(78.4 °C) = 38.6 kJ/mol boiling point = 78.4°C specific heat liquid = 2.46 J/g°C At a pressure of 1 atm, kJ of heat are needed to vaporize a 40.4 g sample of liquid ethanol at its normal boiling point of 78.4 °C.
Use the References to access important values if needed for this question. The following information is...
Use the References to access important values if needed for this question. The following information is given for water at 1 atm: AHyap(100.00 °C) -2.259x103 J/g AHfus(0.000 °C) = 333.5J/g boiling point -100.00 °C melting point=0.000 °C specific heat gas = 2.010 J/g°C specific heat liquid - 4.184 J/gºC A 48.60 g sample of liquid water is initially at 41.90 °C. If the sample is heated at constant pressure (P-1 atm), kJ of energy are needed to raise the temperature...
Use the References to access important valnes if needed for this question. The following information is...
Use the References to access important valnes if needed for this question. The following information is given for benzene at 1 atm: boiling point 80.10 °C AHap(80.10 °C)-393.3 J/g melting point 5.500 °C AHf(5.500 °C)- 127.4 J/g specific heat gas 1.040 J/gC specific heat liquid= 1.740 J/g°C A 35.70 g sample of liquid benzene is initially at 40.90 °C. If the sample is heated at constant pressure (P 1 atm), kJ of energy are needed to raise the temperature of...
eierences to access important values if needed for this question. A chemical reaction is run in...
eierences to access important values if needed for this question. A chemical reaction is run in which 139 Joules of heat are generated and 750 Joules of work are done by the system. Calculate the change in the internal energy of the chemical system. A E= Joules es important values if needed for this question. The following thermochemical equation is for the reaction of hydrogen sulfide(g) with oxygen(g) to form water(g) and sulfur dioxide(g) 2H S(g) + 302(9) 2H2O(g) +...
USC e Reterences to access important values if needed for this question. The following information is given for tin...
USC e Reterences to access important values if needed for this question. The following information is given for tin at latm: T = 2270.00°C AHvap (2270.00°C) = 1.939 x 10 Jg T = 232.00°C AH fus (232.00°C) = 59.60 J/g Specific heat solid = 0.2260 J/g °C Specific heat liquid = 0.2430 J/g °C A 21.40 g sample of liquid tin at 522.00°C is poured into a mold and allowed to cool to 28.00°C. How many kJ of energy are...
Use the References to access important values if needed for this qu The following information is...
Use the References to access important values if needed for this qu The following information is given for nickel at 1 atm: T = 2732.00°C AHvap (2732.00°C) = 6.450 x 108 J/g AHS (1453.00°C) = 300.1 J/g T = 1453.00°C Specific heat solid -0.4440 J/g °C Specific heat liquid = 0.7320 J/g °C A 31.50 g sample of solid nickel is initially at 1430.00°C. If 7.626 x 103 J of heat are added to the sample at constant pressure P=1...
The following information is given for tin at 1atm:
1)The following information is given for tin at 1atm:boiling point = 2270 °CΔHvap(2270 °C) = 230 kJ/molmelting point = 232 °CΔHfus(232 °C) = 7.07 kJ/molspecific heat solid= 0.226 J/g°Cspecific heat liquid = 0.243 J/g°CWhat is ΔH in kJ for the process of freezing a 35.6 g sample of liquidt in at its normal melting point of 232 °C.2)The following information is given for antimony at 1atm:boiling point = 1440 °CΔHvap(1440°C) = 195 kJ/molmelting point = 631 °CΔHfus(631°C) = 19.6 kJ/molspecific heat solid=...
A. For manganese, Mn, the heat of fusion at its normal melting point of 1244 °C...
A. For manganese, Mn, the heat of fusion at its normal melting point of 1244 °C is 14.6 kJ/mol. The entropy change when 2.46 moles of liquid Mn freezes at 1244 °C, 1 atm is ______ J/K. b. For lead, Pb, the heat of vaporization at its normal boiling point of 1740 °C is 177.8 kJ/mol. The entropy change when 1.99 moles of liquid Pb vaporizes at 1740 °C, 1 atm is ____ J/K. please make sure final answer is...
The following information is given for lead at latm: AH yap(1740 °C) -178 kJ/mol AH fus(328 °C) = 4.77 kJ/mol boiling point = 1740 °C melting point = 328 °C specific heat solid= 0.130 J/gºC specific heat liquid = 0.138 J/gºC What is AH in kJ for the process of freezing a 26.3 g sample of liquid lead at its normal melting point of 328 °C. The following information is given for silver at latm: AHvap(2212 °C) = 254 kJ/mol...
References) Use the References to access important values if needed for this question. The following information is given for ethanol, C2HOH, at latm: boiling point 78.4 °C specific heat liquid 2.46 J/g°C AHa(78.4 °C)38.6 kJ/mol At a pressure of 1 atm, kJ of heat are needed to vaporize a 40.4 g sample of liquid ethanol at its normal boiling point of 78.4 °C.
Use the References to access important values if needed for this question. The following information is given for ethanol CH3OH, at latm: AH 2p(78.4 °C) = 38.6 kJ/mol boiling point = 78.4°C specific heat liquid = 2.46 J/g°C At a pressure of 1 atm, kJ of heat are needed to vaporize a 40.4 g sample of liquid ethanol at its normal boiling point of 78.4 °C.
Use the References to access important values if needed for this question. The following information is given for water at 1 atm: AHyap(100.00 °C) -2.259x103 J/g AHfus(0.000 °C) = 333.5J/g boiling point -100.00 °C melting point=0.000 °C specific heat gas = 2.010 J/g°C specific heat liquid - 4.184 J/gºC A 48.60 g sample of liquid water is initially at 41.90 °C. If the sample is heated at constant pressure (P-1 atm), kJ of energy are needed to raise the temperature...
Use the References to access important valnes if needed for this question. The following information is given for benzene at 1 atm: boiling point 80.10 °C AHap(80.10 °C)-393.3 J/g melting point 5.500 °C AHf(5.500 °C)- 127.4 J/g specific heat gas 1.040 J/gC specific heat liquid= 1.740 J/g°C A 35.70 g sample of liquid benzene is initially at 40.90 °C. If the sample is heated at constant pressure (P 1 atm), kJ of energy are needed to raise the temperature of...
eierences to access important values if needed for this question. A chemical reaction is run in which 139 Joules of heat are generated and 750 Joules of work are done by the system. Calculate the change in the internal energy of the chemical system. A E= Joules es important values if needed for this question. The following thermochemical equation is for the reaction of hydrogen sulfide(g) with oxygen(g) to form water(g) and sulfur dioxide(g) 2H S(g) + 302(9) 2H2O(g) +...
USC e Reterences to access important values if needed for this question. The following information is given for tin at latm: T = 2270.00°C AHvap (2270.00°C) = 1.939 x 10 Jg T = 232.00°C AH fus (232.00°C) = 59.60 J/g Specific heat solid = 0.2260 J/g °C Specific heat liquid = 0.2430 J/g °C A 21.40 g sample of liquid tin at 522.00°C is poured into a mold and allowed to cool to 28.00°C. How many kJ of energy are...
Use the References to access important values if needed for this qu The following information is given for nickel at 1 atm: T = 2732.00°C AHvap (2732.00°C) = 6.450 x 108 J/g AHS (1453.00°C) = 300.1 J/g T = 1453.00°C Specific heat solid -0.4440 J/g °C Specific heat liquid = 0.7320 J/g °C A 31.50 g sample of solid nickel is initially at 1430.00°C. If 7.626 x 103 J of heat are added to the sample at constant pressure P=1...
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