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the reaction is exothermic

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What is a chemical reaction at equilibrium?

deltaG = deltaH -TdeltaS. deltaG = 0 at equilibrium. Therefore deltaH = TdeltaS


How is the deltaHf related to the deltaH of a reaction?

The enthalpy of formation (deltaHf) is the enthalpy change when 1 mole of a compound is formed from its constituent elements in their standard states. The deltaH of a reaction is the difference in enthalpy between the products and the reactants. The deltaH of a reaction can be calculated by taking the sum of the deltaHf of the products minus the sum of the deltaHf of the reactants.


What does a negative H tell you about a reaction?

yes


Is baking soda and citric acid a endothermic or exothermic reaction?

It is endothermic. The heat of the water in the calorimeter decreases (giving you a -deltaH), which means that the system absorbed heat, making the reaction endothermic.


Which of the following is endothermic a dry ice evaporating b a sparkler burning c the reaction that occurs in a chemical cold pack often used to ice athletic injuries?

Dry ice evaporating is endothermic-->+DeltaH A sparkler burning is exothermic--->-DeltaH The reaction that occurs in a chemical cold pack often used to ice athletic injuries is endothermic--->+DeltaH


When the actual free energy change of a reaction change in G has a numerical value of less than zero negative number what will happen?

When the delta G is negative the reaction is said to be spontaneous or in other words favorable. It also means the reaction is irreversible once full product concentration is reached. If delta G is positive, the reaction is unfavorable thus can easily be reversed. If it is zero it is at equilibrium.


What does a negative H tell about a reaction?

A negative change in enthalpy (ΔH) indicates that a reaction is exothermic, meaning it releases heat to its surroundings. This suggests that the products have less energy than the reactants, leading to a decrease in enthalpy during the reaction.


Can the extent of a reaction be negative?

Yes, the extent of a reaction can be negative if the reaction does not proceed as expected or if the products formed are not desirable.


What important information does thermochemical equation have that a regular balanced equations does not?

A thermochemical equation shows the amount of heat given out or taken in when the reaction occurs. CH4 + 2O2 = CO2 +2H2O, deltaH = -890 kJ/mol Note delta H is negative when heat is given out, exothermic and +ve when endothermic. Sorry can't do delta symbol - its a triangle!


What does it indicate when the value of G is negative in a chemical reaction?

When the value of G is negative in a chemical reaction, it indicates that the reaction is spontaneous and releases energy.


What would form a spontaneous reaction at 298 K?

deltaH=28 kJ/mol, deltaS=0.109 kJ(molK)


What does a negative enthalpy indicate in a chemical reaction?

A negative enthalpy in a chemical reaction indicates that the reaction is exothermic, meaning it releases heat energy to the surroundings.