This is your answer I hope it is right.
Answer:
The initial temperature of helium was T1 = 232.23 K
Explanation:
Given data:
Initial volume V1 = 5 L
Initial pressure P1 = 699 mmHg
Final pressure P2 = 800 mmHg
Final volume V2 = 5.7 L
Final temperature T2= 303 K
Initial temperature T1 = ?
Solution:
Formula:
P1V1/T1 = P2V2/T2
T1 = T2 × P1V1/P2V2
T1 = 303 K × 699 mmHg × 5 L / 800 mmHg × 5.7 L
T1 = 1058985/ 4560
T1 = 232.23 K
initial temperature of helium was 232.23 k.
Answers are:
1) The metals were not heated to 100°C.
2) The metals cooled before they were added to the water.
3) The thermometer was not completely submerged in the water while reading.
4) The calorimeter was not sealed properly, so heat escaped.
First Law of Thermodynamics - any heat lost by the system must be absorbed by the surroundings.
-qsystem = qsurroundings.
Heat spontaneously flows from a hotter (in this example hot metal) to a colder body (in this example water).
Student did not have mistake in determining the specific heat of metals, because there is heat lost during experiment.
Heat capacity of a sample is expressed in units of thermal energy per degree temperature (J/K).
Heat capacity is often defined relative to a unit of mass (J/kg·K or J/g·K), prefixed with the term specific.
For example, specific heat capacity of water is 4.184 J/g·K (Cp(H₂O) = 4.184 J/g·K).
Antacids with Calcium Carbonate are used to relieve symptoms such as heartburn and excessive stomach pain, due to higher levels of ACID in the stomach and/or acid rising. The calcium carbonate is a BASE, therefore NEUTRALIZING the acid/base content in your stomach and alleviating discomfort. A strong acid plus a strong bases creates a basic solution.
