Answer:
Endothermic, because the reactants are lower in energy (C)
Explanation:
From the graph, you can see the energy of the products is higher than the energy of the reactants. If you recall that when the enthalpy change Eproducts is gretater than Ereactants, the reaction is said to be endothermic.
Answer:
Percent error can be reduced by improving both your accuracy and precision.
Both of them are Heterogeneous mixtures. They can both be separated into their compounds, but not down to the element.
<u>417 K is the “final temperature” of the gas</u>.
<u>Explanation</u>:
According to “Charles law” the change in “volume” of a given mass of gas expanded is “directly proportional” to the “temperature” of the given gas expanded. When we keep “pressure” of the gas as constant. Mathematically,


If gas is expanded from initial volume to final volume and initial temperature to final temperature then,


Given that,
Initial volume is 1.0L
Final volume is 1.5L

To find final temperature of the gas
Substitute the given values,



Therefore, <u>final temperature of the gas after expanding is 417 K</u>.