Chemical reactions are usually exothermic or endothermic. A balanced thermochemical equation involving physical states of reactants and products expresses the chemical changes as well as heat of reaction. Heat changes are usually expressed in terms of 
(at constant 
) or 
(at constant 
. The heats of reactions varies with physical state of reactants and products, conditions of constant pressure or volume and temperature. Heats of combustion and heat of neutralization, heat of condensation are always exothermic. Standard heat enthalpy of a compound is its heat of formation at 1 atm
and 25°C.
The heat energy released during neutralization of 1 eq. of 
and with 1 eq. of 
and 1 eq. of 
are respectively :
a)
b)
c)
d)
(at constant ) or (at constant . The heats of reactions varies with physical state of reactants and products, conditions of constant pressure or volume and temperature. Heats of combustion and heat of neutralization, heat of condensation are always exothermic. Standard heat enthalpy of a compound is its heat of formation at 1 atm and 25°C.The heat energy released during neutralization of 1 eq. of and with 1 eq. of and 1 eq. of are respectively :
a)
b)
c)
d)
Question ID - 103892 | SaraNextGen Top Answer Chemical reactions are usually exothermic or endothermic. A balanced thermochemical equation involving physical states of reactants and products expresses the chemical changes as well as heat of reaction. Heat changes are usually expressed in terms of (at constant ) or (at constant . The heats of reactions varies with physical state of reactants and products, conditions of constant pressure or volume and temperature. Heats of combustion and heat of neutralization, heat of condensation are always exothermic. Standard heat enthalpy of a compound is its heat of formation at 1 atm and 25°C.
The heat energy released during neutralization of 1 eq. of and with 1 eq. of and 1 eq. of are respectively :
a)
b)
c)
d)
Chemical reactions are usually exothermic or endothermic. A balanced thermochemical equation involving physical states of reactants and products expresses the chemical changes as well as heat of reaction. Heat changes are usually expressed in terms of (at constant ) or (at constant . The heats of reactions varies with physical state of reactants and products, conditions of constant pressure or volume and temperature. Heats of combustion and heat of neutralization, heat of condensation are always exothermic. Standard heat enthalpy of a compound is its heat of formation at 1 atm and 25°C.
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The heat energy released during neutralization of 1 eq. of |
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a) |
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b) |
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c) |
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d) |
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(a)
Heat released during neutralization of weak acid 
in 
hydration of 
ion is responsible for higher value.