Chemistry, 22.09.2020 15:01, ohartshorn1599
The easiest way to determine whether a process is exothermic or endothermic is to note the change in temperature in a calorimeter; a positive temperature change indicates an exothermic process while a negative temperature change indicates an endothermic process. Select the Experiment tab in the Simulation, and then click Run Demonstration. Perform the described tasks while specifically focusing on the third demonstration, where LiCl is dissolved in water, paying attention to the temperature change and the microscopic view.
Match the words in the left column to the appropriate blanks in the sentences on the right.
slower
higher
exothermic
endothermic
lower
faster
lost
gained
surroundings
system
In the calorimeter, water is the . The salt LiCl, which will dissolve, is the .
. The salt LiCl, which will dissolve, is the .
The final temperature of the water after the dissolution of LiCl was than the initial temperature, meaning the process is
In the microscopic view of the dissolution of LiCl, water molecules were seen to move as they energy.
Answers: 3
Chemistry, 23.06.2019 03:30, uniqueray33
The molar mass of nickel(ni) is 58.7 g/mol. how many moles are in an 88 gram sample of nickel?
Answers: 1
Chemistry, 23.06.2019 08:30, vett072804
Benzonitrile (c6h5cn) is reduced to two different products depending on the reducing agent used. treatment with lithium aluminum hydride followed by water forms k, which has a molecular ion in its mass spectrum at 107 and the following ir absorptions: 3373, 3290, 3062, 2920, and 1600 cm-1. treatment with a milder reducing agent forms l, which has a molecular ion in its mass spectrum at 106 and the following ir absorptions: 3086, 2850, 2820, 2736, 1703, and 1600 cm-1. l shows fragments in its mass spectrum at m/z = 105 and 77. propose structures for k and l and choose an explanation for how this could be concluded.
Answers: 3
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