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What is true for the gas phase reaction shown below 2NH3 gives n2 plus 3h2 delta H equals 160.58 kj?
Wiki User
∙ 11y ago
s is positive and g is negative at low temperatures only
Wiki User
∙ 11y ago
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How is delta hf related to the delta h of the reaction?
The standard enthalpy change of a reaction (delta H) is related to the standard enthalpy of formation (delta Hf) of the products and reactants involved in the reaction by the equation: delta H = Σ(Products delta Hf) - Σ(Reactants delta Hf). This equation relates the enthalpy change of a reaction to the enthalpies of formation of the substances involved in the reaction.
Calculate the change in enthalpy for the Mg HCl reaction using standard enthalpies of formation delta hf for HCl aq equals -167.2 kj and delta hf for MgCl2 aq equals -791.2 kj?
The reaction is: Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) The change in enthalpy for the reaction is calculated by summing the standard enthalpies of formation of products and subtracting the sum of the standard enthalpies of formation of reactants. ΔH = [(-791.2 kJ) + 0] - [(0) + 2*(-167.2 kJ)] = -456.8 kJ
What is S in the equation delta G equals delta H minus TdeltaS?
The change in enthalpy between products and reactants in a reaction
When is heat of a reaction equal to the enthalpy change of the same reaction?
The heat of a reaction is equal to the enthalpy change of the same reaction when the only work done is PV work. This is because in this scenario, the enthalpy change represents the heat transfer at constant pressure, which is equivalent to the heat of the reaction.
What is delta h in the equation delta g delta h - t delta s?
Delta H represents the change in enthalpy of a system. In the equation ΔG = ΔH - TΔS, it is the enthalpy change of the system. It indicates the heat absorbed or released during a reaction at constant pressure.
How is delta hf related to the delta h of the reaction?
The standard enthalpy change of a reaction (delta H) is related to the standard enthalpy of formation (delta Hf) of the products and reactants involved in the reaction by the equation: delta H = Σ(Products delta Hf) - Σ(Reactants delta Hf). This equation relates the enthalpy change of a reaction to the enthalpies of formation of the substances involved in the reaction.
What does the delta h of a reaction represent?
Either the change (which the delta refers to) of the height (which the h represents).
Delta H equals delta E plus delta nRT prove?
Yes
What is delta h in the equation delta g delta h - t delta?
The change in enthalpy between products and reactants in a reaction
What is delta S in the equation delta G delta H - T delta S?
The change in enthalpy between products and reactants in a reaction
What does a negative delta H for a reaction suggest?
A negative delta H for a reaction suggests that the reaction is exothermic, meaning it releases heat to its surroundings. This implies that the products of the reaction have lower energy than the reactants.
What determine whether a reaction took place?
Whether a reaction took place is determined by the change in chemical composition, the formation of new substances, the release of energy or heat, and the color change or visible evidence of a chemical change. These factors indicate that a chemical reaction has occurred.
When a chemical reaction has a negative delta G is the reaction exothermic or endothermic?
When a chemical reaction has a negative delta G, the reaction is exothermic because delta G is the change in energy of a system and the change in its entropy. If the effect of a reaction is to reduce G, the process will be spontaneous so delta G is negative. Hope this helps :)
Calculate the change in enthalpy for the Mg HCl reaction using standard enthalpies of formation delta hf for HCl aq equals -167.2 kj and delta hf for MgCl2 aq equals -791.2 kj?
The reaction is: Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) The change in enthalpy for the reaction is calculated by summing the standard enthalpies of formation of products and subtracting the sum of the standard enthalpies of formation of reactants. ΔH = [(-791.2 kJ) + 0] - [(0) + 2*(-167.2 kJ)] = -456.8 kJ
What equation is used to calculate the free change of a reaction?
Delta G (written triangle G) = Delta H -T Delta S
What is S in the equation delta G equals delta H minus TdeltaS?
The change in enthalpy between products and reactants in a reaction
When is heat of a reaction equal to the enthalpy change of the same reaction?
The heat of a reaction is equal to the enthalpy change of the same reaction when the only work done is PV work. This is because in this scenario, the enthalpy change represents the heat transfer at constant pressure, which is equivalent to the heat of the reaction.
