10 Questions
Hess's Law states that the change in enthalpy when reactants are converted to products is different depending on whether the reaction takes place in one step or in a series of steps.
False
According to Hess's Law, the enthalpy change for the overall reaction depends on the nature of the reactants and products.
True
Enthalpy is a state function that depends on the path taken during a chemical reaction.
False
Hess's Law can be used to calculate the enthalpy change for an overall reaction by breaking it down into a series of smaller reactions with known enthalpy values.
True
The analogy used to explain Hess's Law involves going from the first floor to the sixth floor of a building by stairs.
False
The concept of state function in chemistry means that enthalpy change will vary based on the specific route taken during a reaction.
False
Indirect Route is another term for breaking down a complex reaction into simpler ones to calculate the overall enthalpy change.
True
Enthalpy of Formation represents the heat released or absorbed when one mole of a substance is formed from its elements in their standard states.
True
State Function principle implies that enthalpy change is influenced by factors other than the initial and final states of a system.
False
Hess's Law relies on the fact that enthalpy is path-dependent and varies with the specific route taken during a chemical reaction.
False
Test your knowledge on calculating the standard enthalpy change of reactions using the given enthalpy values. Solve for ∆H0 rxn for the reactions S(s) + 3/2 O2(g) → SO3(g) and C(graphite) + 2H2(g) → CH4(g) based on the provided enthalpy changes.
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