Question
In: Chemistry
The standard molar heat of formation of water is -258.8 kJ/mol.a. What is the significance of...
The standard molar heat of formation of water is -258.8 kJ/mol.
a. What is the significance of the negative sign associated with this value?
b. why is the magnitude of this value so much larger than the heat of vaporization of water (?H° vap = 41 kJ/mol)?
c. Calculate the amount of heat produced in making 50.0 mL of water from its elements under standard conditions.
a. What is the significance of the negative sign associated with this value?
b. why is the magnitude of this value so much larger than the heat of vaporization of water (?H° vap = 41 kJ/mol)?
c. Calculate the amount of heat produced in making 50.0 mL of water from its elements under standard conditions.
Solutions
queen_honey_blossom answered 1 year agoRelated Solutions
The standard enthalpy of fusion of water is 6.01 kJ/ mol, the molar heat capacity at...
The standard enthalpy of fusion of water is 6.01 kJ/ mol, the
molar heat capacity at a constant pressure of liquid water can be
assumed to be constant at 75.5 J/mol*K, thoughout the liquid phase,
and the standard enthalpy of vapoziration is 40.7 kJ/mol at the
boiling point. Calculate the total entropy change (in SI
units), for heating one mole of water, starting with ice
just below the melting point and going to just above the boiling
point at standard...
The standard heat of formation of CaBr2 is -675 kJ/mol. The first ionization energy of Ca...
The standard heat of formation of CaBr2 is -675 kJ/mol. The
first ionization energy of Ca is 590 kJ/mol and its second
ionization energy is 1145 kJ/mol. The heat of sublimation of
Ca[Ca(s)→Ca(g)] is 178 kJ/mol. The bond energy of Br2 is 193
kJ/mol, the heat of vaporization of Br2(l) is 31 kJ/mol, and the
electron affinity of Br is -325 kJ/mol.
Calculate the lattice energy of CaBr2.
The standard heat of formation of PI3(s) is -24.7 kJ/mol and the PI bond energy in...
The standard heat of formation of PI3(s) is -24.7 kJ/mol and the
PI bond energy in this molecule is 184 kJ/mol. The standard heat of
formation of P(g) is 334 kJ/mol and that of I2(g) is 62 kJ/mol. The
I2 bond energy is 151 kJ/mol.
Calculate the heat of sublimation of PI3
1. Specific heat of water is 4.184 J/g ˚C. What is the heat in KJ gained...
1. Specific heat of water is 4.184 J/g ˚C. What is the heat in
KJ gained when 20 q of water is heated from 22˚C to 77˚C?
2. What is the heat in J to melt 100g of NaCl when the HF for
NaCl is 518 J/g?
3. What is the heat in J to equate 50 g Acetic Acid when the HE
= 390 J/g?
Given that the heat of fusion of water is -6.02 kJ/mol, that the heat capacity of...
Given that the heat of fusion of water is -6.02 kJ/mol, that the
heat capacity of H2O(l) is 75.2 J/mol⋅K and that the heat
capacity of H2O(s) is 37.7 J/mol⋅K, calculate the heat of
fusion of water at -10 ∘C. Please show work
Given that the heat of fusion of water is -6.02 kJ/mol, that the heat capacity of...
Given that the heat of fusion of water is -6.02 kJ/mol, that the
heat capacity of H2O(l) is 75.2 J/mol⋅K and that the heat capacity
of H2O(s) is 37.7 J/mol⋅K, calculate the heat of fusion of water at
-14 ∘C.
I feel like I should be able to get this problem but something
is just not clicking. Thank you for your help!
Given that the heat of fusion of water is -6.02 kJ/mol, that the heat capacity of...
Given that the heat of fusion of water is -6.02 kJ/mol, that the
heat capacity of H2O(l) is 75.2 J/mol⋅K and that the heat
capacity of H2O(s) is 37.7 J/mol⋅K, calculate the heat of
fusion of water at -13 ∘C.
If the heat of combustion for a specific compound is -1270.0 kJ/mol and its molar mass...
If the heat of combustion for a specific compound is -1270.0
kJ/mol and its molar mass is 27.33 g/mol, how many grams of this
compound must you burn to release 200.00 kJ of heat?
Pure liquid water has a heat of vaporization of x kJ/mol. The vapor pressure of water...
Pure liquid water has a heat of vaporization of x kJ/mol. The
vapor pressure of water is 23.756 torr at room temperature (25 °C).
What would the vapor pressure of water be expected to be at 37 °C?
How would the vapor pressure be changed if 1.0 gram of NaCl were
added to a volume of 100 mL of water?
how many kj of heat are absorbed when 455g of water at 80.0C are heated to...
how many kj of heat are absorbed when 455g of water at 80.0C are
heated to 100.0C and then completely evaporated at this
tempertature? The Specific heat of water 4.184j/C, g and the molar
heat of evaporation for water is 40.7kJ/mol.
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