On a temperature versus time graph, how does the temperature at the beginning of a change of state compare with the temperature
at the end of the change?
2 answers:
Answer:
It Remains Constant
Explanation:
When the temperature over a matter remains constant, subsequently the kinetic energy among them is also constant, then there is a phase change.
The graph is a linear function given by the formula, which measures the heat necessary in the system:
Q=mcΔt
So it increases linearly in the same state. Remains constant when there's a change of state. According to the function above and the graph below.
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Answer:
The volume of carbon dioxide gas generated 468 mL.
Explanation:
The percent by mass of bicarbonate in a certain Alka-Seltzer = 32.5%
Mass of tablet = 3.45 g
Mass of bicarbonate =
Moles of bicarbonate ion =
According to reaction, 1 mole of bicarbonate ion gives with 1 mole of carbon dioxide gas , then 0.01840 mole of bicarbonate ion will give:
of carbon dioxide gas
Moles of carbon dioxide gas n = 0.01840 mol
Pressure of the carbon dioxide gas = P = 1.00 atm
Temperature of the carbon dioxide gas = T = 37°C = 37+273 K=310 K
Volume of the carbon dioxide gas = V
(ideal gas equation)
1 L = 1000 mL
0.468 L =0.468 × 1000 mL = 468 mL
The volume of carbon dioxide gas generated 468 mL.