Twhen a calorimeter is used, no heat is exchanged between the contents of the container and the outside air. if an exothermic reaction is conducted inside a calorimeter filled with water, which of the following statements best describes what occurs during the reaction?

a. the total energy inside the calorimeter is conserved.
b. the thermometer will show a decrease in temperature.
c. the water decreases in temperature as the reaction absorbs heat.
d. the potential energy of the reactants is lower than that of the reactants.

option A. The total energy inside the calorimeter is conserved.

Explanation:

Since no heat is exchanged between the contents of the container and the outside air, If an exothermic reaction is conducted inside a calorimeter filled with water, you can do the following analysis:

The law of conservation of energy for the calorimeter, where no heat is exchanged between the contents of the container and the outside air, states that:

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2