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What does negative sign if the value of magnification of a mirror indicate?
It means that the pre-image and image are on opposite sides of the centre of magnification.
What does a negative add a positive equal?
If the absolute value of the negative is bigger than that of the positive, then the answer is negative. If the absolute value of the negative is the same, then zero. If the absolute value of the negative is smaller, then positive. Absolute value is the value ignoring the sign.
Will a negative number to the fifth power be a positive or negative value?
The result will be a negative value.
Can an absolute value equal a negative?
An absolute value can not be negative.
Does a negative value multiplied by a negative value eguals a negative?
No, like signs multiply to positive, unlike to negative.
What is the relationship between the formation reactions that are exothermic and their corresponding enthalpy of formation values (hf)?
The relationship between exothermic formation reactions and their enthalpy of formation values is that exothermic reactions release heat energy when the compound is formed. This results in a negative enthalpy of formation value (hf) because the reaction is giving off energy.
What best describe the enthalpy of formation of a substance?
The enthalpy of formation of a substance is the energy change when a substance is formed from its elements in their standard states. It represents the heat energy released or absorbed during the formation process. A negative value indicates that the reaction is exothermic, while a positive value indicates an endothermic reaction.
What is the standard enthalpy of formation of coconut oil?
The standard enthalpy of formation of coconut oil is not a well-defined value as it is a complex mixture of triglycerides, which are composed of various fatty acids. The enthalpy of formation of each individual fatty acid can be determined, but not for coconut oil as a whole.
Is it possible for the change in enthalpy, represented as H, to have a negative value in a chemical reaction?
Yes, it is possible for the change in enthalpy (H) to have a negative value in a chemical reaction, indicating that the reaction releases heat energy.
The change in enthalpy that accompanies the formation of a compound from its elements?
The energy change that happens when a substance forms from its elements (APEX)
If you need to reverse the following reaction in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of rea?
286 kJ
What is Enthalpy of formation of chloroform?
The standard enthalpy of formation of chloroform (CHCl3) is -68.3 kJ/mol at 25°C. This value represents the heat released when one mole of chloroform is formed from its elements in their standard states.
What is the heat of formation of NaCl?
The standard enthalpy of formation for sodium chloride is -411,12 kJ/mol.
Why is the enthalpy change of combustion always negative?
The enthalpy change of combustion is always negative because it involves the breaking of bonds in the reactants, which requires energy input, and the formation of new bonds in the products, which releases energy. The energy released during bond formation is greater than the energy required for bond breaking, resulting in a net release of energy, hence the negative value.
If you need to reverse the following reaction in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction you use for this in?
The final value for the enthalpy of the reverse reaction used in a Hess's law problem would simply be the negative of the original value of the enthalpy of the forward reaction. This is because reversing a reaction changes the sign of the enthalpy change.
What does a negative value for the standard potential indicate?
the negative value for a standard potential indicates that the reaction is not spontaneous.
What is true of the enthalpy reaction?
The enthalpy of a reaction is a measure of the heat energy exchanged with the surroundings at constant pressure. A negative enthalpy change indicates an exothermic reaction, where heat is released. A positive enthalpy change indicates an endothermic reaction, where heat is absorbed.
