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
Add Answer to:
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...
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) +...
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...
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=...
Use the References to access important values if needed for this question. In the laboratory a...
Use the References to access important values if needed for this question. In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a metal. She heats 19.0 grams of gold to 99.10"C and then drops it into a cup containing 78.4 grams of water at 21.19°C. She measures the final temperature to be 21.79°C. Assuming that all of the heat is transferred to the water, she calculates the specific heat of gold to be...
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...
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) +...
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...
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...
Use the References to access important values if needed for this question. In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a metal. She heats 19.0 grams of gold to 99.10"C and then drops it into a cup containing 78.4 grams of water at 21.19°C. She measures the final temperature to be 21.79°C. Assuming that all of the heat is transferred to the water, she calculates the specific heat of gold to be...
Most questions answered within 3 hours.
-
On a recent quiz, the class mean was 75 with a standard
deviation of 2.2. Calculate...
asked 6 seconds ago -
Discuss the Coefficient of Restitution in an elastic collision
compared to the Coefficient of Restitution in...
asked 4 minutes ago -
Pretend that you are
the audit manager on an annual financial statement audit engagement
for a...
asked 13 minutes ago -
A certain lens focuses light from an object 1.65 m away as an
image 41.8 cm...
asked 13 minutes ago -
Which metal has a resistivity that is within the range or
closest to 4.2X10^-6 to 4.7X10^-6...
asked 18 minutes ago -
5.) Suppose a researcher collected data on the mean height of
tomato plants grown in organic...
asked 31 minutes ago -
(b) A medical statistician wants to estimate the average weight
loss of people who are on...
asked 35 minutes ago -
In scala,
Can you explain what is the difference between them, and why the
first one...
asked 36 minutes ago -
True (T) or False (F) Questions
In a queuing system, if the system’s utilization is 100%,...
asked 45 minutes ago -
What is the total energy transported per hour along a narrow
cylindrical laser beam 1.60 mm...
asked 54 minutes ago -
Key Assessment PAT 6: Sayles Chapter 14 Application Exercise
2
Beginning January 1, Community Hospital had...
asked 59 minutes ago -
Let's assume the following data represents the time from when a
patient is discharged from North...
asked 1 hour ago