Question
In: Chemistry
Calculate the change in entropy that occurs in the system when 45.0 grams of acetone (C3H6O)...
Calculate the change in entropy that occurs in the system when 45.0 grams of acetone (C3H6O) freezes at its melting point (-98.8 oC). (Heat of fusion is 5.69 kJ/mol)
Solutions
queen_honey_blossom answered 2 years agoRelated Solutions
1) Calculate the change in entropy that occurs in the system when 22.0 g of acetone...
1) Calculate the change in entropy that occurs in the
system when 22.0 g of acetone (C3H6O) vaporizes from a liquid to a
gas at its normal boiling point (56.1 ∘C).
Express your answer using three significant
figures.
2) Consider the reaction between nitrogen and oxygen gas
to form dinitrogen monoxide:
2N2(g)+O2(g)→2N2O(g),ΔHrxn=+163.2kJ
Calculate the entropy change in the surroundings associated with
this reaction occurring at 25∘C.
Express the entropy change to three significant figures and
include the appropriate units.
Calculate the change in entropy that occurs in the system when 55.0 g of water vaporizes...
Calculate the change in entropy that occurs in the system when
55.0 g of water vaporizes from a liquid to a gas at its boiling
point (100.0?C).?Hvap = 40.7
kJ/mol
Calculate the change in Entropy
A 288 kg block of ice at 0∘C is placed in a large lake the temperature of the lake is just slightly higher than 0∘C and the ice melts very slowly.
i) what is the entropy change of ice
1. Using standard absolute entropies at 298K, calculate the entropy change for the system when 1.73...
1. Using standard absolute entropies at 298K, calculate the
entropy change for the system when 1.73 moles of CO(g) react at
standard conditions.
CO(g) +
Cl2(g)COCl2(g)
2. Using standard absolute entropies at 298K,
calculate the entropy change for the system when
2.00 moles of
NH4NO3(aq) react at standard
conditions.
NH4NO3(aq)N2O(g)
+ 2H2O(l)
3. Using standard absolute entropies at 298K,
calculate the entropy change for the system when
2.35 moles of CO2(g)
react at standard conditions.
6CO2(g) +
6H2O(l)C6H12O6
+ 6O2(g)
When 5.00 g of acetone (C3H6O) burns in air, carbon dioxide gas and liquid water are...
When 5.00 g of acetone (C3H6O) burns in air, carbon dioxide gas
and liquid water are formed. Enough heat is liberated to increase
the temperature of 1.000 kg of water from 25.0◦C to 61.8◦C. The
specific heat of water is 4.18 J/g-◦C
1. How many kJ of heat are liberated by the combustion
described?
2. How many grams of acetone must be burned to liberate 5.00
kJ?
3. Write the thermochemical equation for the combustion of
acetone.
4. What is...
Question: Calculate the change in entropy when 50g of ice at 0C is dropped into 100.0g...
Question: Calculate the change in entropy when 50g of ice at 0C
is dropped into 100.0g of water at 75C in an insulated vessel. (The
enthalpy of fusion of ice is 6.01 kJ/mol and Cp for water is 75.3
J/K mol, and the molecular weight for H20 =18g/mol)
(a) Calculate the change in entropy when 5.00 moles of ozone are compressed isothermally to one...
(a) Calculate the change in entropy when 5.00 moles of ozone are
compressed isothermally to one quarter of the origional volume.
Treat ozone as an ideal gas.
(b) Calculate the residual entropy at T close to 0 K for 1.00
mol of bromobenzene, (C6H5Br).
(c) What is the sign on ∆S for the following reaction: NaCl (s)
--> Na+ (aq) + Cl- (aq)? Explain why.
Calculate the pH of the following 2 scenarios a) the change in pH that occurs when...
Calculate the pH of the following 2 scenarios
a) the change in pH that occurs when 1.00g of NaOH is added to
250mL of 0.200M CH3CO2H + 0.200M
CH3CO2Na (answer is changepH=0.477)
b) the pH of the buffer prepared by mixing 2.00g of NaOH with
25.0mL of 3.00M chloroacetic acid when it is diluted to 500mL of
water (answer is pH=3.166 but I need to know how to get it)
Calculate the pH of the following 2 scenarios a) the change in pH that occurs when...
Calculate the pH of the following 2 scenarios
a) the change in pH that occurs when 1.00g of NaOH is added to
250mL of 0.200M CH3CO2H + 0.200M
CH3CO2Na (answer is changepH=0.477)
b) the pH of the buffer prepared by mixing 2.00g of NaOH with
25.0mL of 3.00M chloroacetic acid when it is diluted to 500mL of
water (answer is pH=3.166 but I need to know how to get it)
1. Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.73...
1. Using standard thermodynamic data at 298K, calculate the
entropy change for the surroundings when 1.73 moles of Fe2O3(s)
react at standard conditions.
3Fe2O3(s) +
H2(g)2Fe3O4(s)
+ H2O(g)
2. Using standard thermodynamic data at 298K, calculate the entropy
change for the surroundings when
2.00 moles of CO(g) react at
standard conditions.
2CO(g) +
O2(g)2CO2(g)
3. Using standard thermodynamic data at 298K,
calculate the entropy change for the surroundings
when 2.35 moles of
H2O(l) react at standard
conditions.
2H2O(l)2H2(g)
+ O2(g)
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