Silver bromide is used to coat ordinary black-and-white photographic film, while high-speed film...
Question:
Silver bromide is used to coat ordinary black-and-white photographic film, while high-speed film uses silver iodide.
a. When 66.4 mL of 5.00 g/L {eq}AgNO_3 {/eq} is added to a coffee-cup calorimeter containing 66.4 mL of 5.00 g/L {eq}NaI {/eq}, with both solutions at 25 degrees Celsius, what mass of {eq}AgI {/eq} forms?
b. Find {eq}\Delta H_{rxn}^{\circ} {/eq}.
c. What is {eq}\Delta T_{soln} {/eq} (assume the volumes are additive and the solution has the density and specific heat capacity of water)?
Enthalpy of Reaction:
Each chemical reaction has a positive or negative heat change "q" when the reactants are transformed into the products. A reaction may also do pressure-volume work on its surroundings, such as by forming a gaseous product that pushes out the walls of a reaction container. Together these two terms give the enthalpy change of the reaction:
{eq}\Delta H = q + PV {/eq}
Most chemical reactions occur at constant pressure such that {eq}\Delta H = q {/eq}. A positive or negative value means that the chemical reaction will absorb(+) or emit(-) heat energy relative to the surroundings.
Answer and Explanation: 1
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The balanced reaction equation is:
{eq}AgNO_3 (aq) + NaI (aq) \rightarrow AgI (s) + NaNO_3 (aq) {/eq}
- Mass of silver nitrate...
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Enthalpy: Energy Transfer in Physical and Chemical Processes
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Chapter 13 / Lesson 2
29K
When energy is transferred during a chemical reaction, it is called enthalpy. Examine the changes that happen, the relationship to energy, heat, and temperature, exothermic and endothermic processes, and physical and chemical changes during enthalpy.
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