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Which type of reaction are characteristic or negative heat flow?
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What reaction are characteristic of negative heat flow?
Exothermic
When heat flows into a system its value is When heat flows out of a system its value is negative?
Heat is energy and cannot be negative, If you are talking about heat flow then if you define outflow to be negative then inflow is positive.
How do you know if an enthalpy change diagram is endothermic or exothermic?
If you plot the reaction coordinate (what I think you mean by "enthalpy change diagram"), the reaction will be exothermic if the products are lower on the graph than the reactants. If they are higher than it is endothermic. For instance, if you go to the linked Wikipedia page (link to the left of this answer), the graph shown is of an exothermic reaction.
What is the enthalpy of a reaction?
The amount of energy that is used or released as heat in a reaction.
What chemical bond possess low latent heat of fusion?
Latent heat of fusion (or enthalpy of fusion) is a characteristic of a substance, rather than a chemical bond. If you mean enthalpy of reaction then the lowest absolute values are for the bonds in H2, F2, and Cl2 as gases, which are zero. One low (and negative) value is for cuprous sulphate. Please see the link.
What reaction are characteristic of negative heat flow?
Exothermic
What is downward heat flow?
negative heat
When heat flows into a system its value is When heat flows out of a system its value is negative?
Heat is energy and cannot be negative, If you are talking about heat flow then if you define outflow to be negative then inflow is positive.
Why is the enthalpy change of combustion always negative?
It is and exothermic reaction, which means energy is given out heating the surroundings.
Does hydration of ethylene to form ethanol a type of exothermic reaction?
Yes, the heat of reaction is negative therefore indicating an exothermic reaction
A synthesis reaction will occur spontaneously if heat of formation of product is?
large and negative
When heat flow into a system it's value is when heat flows out of a system it's value is negative?
positive < Mitzy >
How is thermochemical equation different from a balanced chemical equation?
They specify heat flow for the reaction.
What is the characteristic of combustion reaction?
Combustion is the description of the reaction that results when a substance burns when heat is applied fast enough. Usually combustion also cause a rapid expansion of gasses from the reaction.
What kind of enthalpy change favors a spontaneous reaction?
An exothermic reaction is a chemical reaction that releases energy in the form of heat. It favors a negative enthalpy change.
Is thermal energy negative or positive?
exothermic heat is negativeA different opinion:Heat itself cannot be negative. An exothermic reaction is a chemical reaction wherein a substance gives up heat. Since the substance is giving up energy in the form of heat, the enthalpy change of the substance is negative.
What is heat of reaction and enthalpy of reaction?
Heat of reaction and enthalpy of reaction are the same thing. Enthalpy, or the heat transfer, cannot be measured, however we can measure the CHANGE of enthalpy which is shown by a value of ∆H. This measured in kilojoules per mole of reactant. (KJ/mol)This value may be positive or negative. For endothermic reactions (which absorb heat), the ∆H value is always positive. For exothermic, where heat is released, the value is negative.
