H' (aq) + OH-(aq) → H2O(1) NH3, c sure of the heat of neutralization is -56.2 kJ mol-1. What is the final temperature of the mixed solution? 3.39 When 1.034 g of naphthalene (C1oHs) are com- this rea 3.46 T pletely burned in a constant-volume bomb calorimeter acid a at 298 K, 41.56 kJ of heat is evolved. Calculate the values of A, U and A,H for the reaction. water respe isome Thermochemistry 3.40 Consider the following reaction: 2CH3OH(I) + 3O2(g) → 4H20(1) + 2CO2 (g) A,Ho-1452.8 kJ mol-1 What is the value of Δ,Ho if (a) the equation is multi- plied throughout by 2, (b) the direction of the reaction is reversed so that the products become the reactants and vice versa, and (c) water vapor instead of liquid water is the product? 3.41 Which of the following standard enthalpy of for- mation values is not zero at 25°C? Na(s), Ne(g), CH4(9), S8 (s), Hg(), H(g). 3.42 The standard enthalpies of formation of ions in aqueous solution are obtained by arbitrarily assigning a value of zero to H+ ions; that is, ΔΗ'H+(aq)]-0. 3.4 an 3 (a) For the following reaction, HCl (g)--H+ (aq) + Cl-(aq) A,H' -74.9 kJ mol-1

Question

3.40

H' (aq) + OH-(aq) → H2O(1)
NH3, c
sure of
the heat of neutralization is -56.2 kJ mol-1. What is
the final temperature of the mixed solution?
3.39 When 1.034 g of naphthalene (C1oHs) are com-
this rea
3.46 T
pletely burned in a constant-volume bomb calorimeter acid a
at 298 K, 41.56 kJ of heat is evolved. Calculate the
values of A, U and A,H for the reaction.
water
respe
isome
Thermochemistry
3.40 Consider the following reaction:
2CH3OH(I) + 3O2(g) → 4H20(1) + 2CO2 (g)
A,Ho-1452.8 kJ mol-1
What is the value of Δ,Ho if (a) the equation is multi-
plied throughout by 2, (b) the direction of the reaction
is reversed so that the products become the reactants
and vice versa, and (c) water vapor instead of liquid
water is the product?
3.41 Which of the following standard enthalpy of for-
mation values is not zero at 25°C? Na(s), Ne(g),
CH4(9), S8 (s), Hg(), H(g).
3.42 The standard enthalpies of formation of ions in
aqueous solution are obtained by arbitrarily assigning a
value of zero to H+ ions; that is, ΔΗ'H+(aq)]-0.
3.4
an
3
(a) For the following reaction,
HCl (g)--H+ (aq) + Cl-(aq)
A,H'
-74.9 kJ mol-1
Expand
Transcribed Image Text

H' (aq) + OH-(aq) → H2O(1) NH3, c sure of the heat of neutralization is -56.2 kJ mol-1. What is the final temperature of the mixed solution? 3.39 When 1.034 g of naphthalene (C1oHs) are com- this rea 3.46 T pletely burned in a constant-volume bomb calorimeter acid a at 298 K, 41.56 kJ of heat is evolved. Calculate the values of A, U and A,H for the reaction. water respe isome Thermochemistry 3.40 Consider the following reaction: 2CH3OH(I) + 3O2(g) → 4H20(1) + 2CO2 (g) A,Ho-1452.8 kJ mol-1 What is the value of Δ,Ho if (a) the equation is multi- plied throughout by 2, (b) the direction of the reaction is reversed so that the products become the reactants and vice versa, and (c) water vapor instead of liquid water is the product? 3.41 Which of the following standard enthalpy of for- mation values is not zero at 25°C? Na(s), Ne(g), CH4(9), S8 (s), Hg(), H(g). 3.42 The standard enthalpies of formation of ions in aqueous solution are obtained by arbitrarily assigning a value of zero to H+ ions; that is, ΔΗ'H+(aq)]-0. 3.4 an 3 (a) For the following reaction, HCl (g)--H+ (aq) + Cl-(aq) A,H' -74.9 kJ mol-1

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