21.90 kJ/g x 0.1182 g = ?q = energy obtained by combusting salicylic acid.
Then calculate the heat capacity of the calorimeter. That is
q from above = C/degree c x 2.84 and solve for C, the heat capacity of the calorimeter.
q = heat capacity x delta T
q = Cfrom above x 3.50
Solve for q and that is q/0.2086g and that gives you q/gram of the unknow
I see my response to one of your earlier question but no question
To calculate the energy obtained by combusting salicylic acid, we can multiply the heat of combustion (21.90 kJ/g) by the mass of salicylic acid (0.1182 g):
q = 21.90 kJ/g x 0.1182 g
q = 2.58678 kJ
So, the energy obtained by combusting salicylic acid is approximately 2.58678 kJ.
To calculate the heat capacity of the calorimeter, we can use the equation:
q = C/degree c x 2.84
Rearranging the equation, we get:
C = q/degree c x 2.84
Now, substituting the value of q obtained earlier (2.58678 kJ) and the temperature change (3.50 °C), we can solve for C:
C = (2.58678 kJ)/(3.50 °C) x 2.84
C = 2.58678 kJ/°C x 0.812
So, the heat capacity of the calorimeter is approximately 2.102 kJ/°C.
Finally, to determine q per gram of the unknown substance, we can use the equation:
q = heat capacity x delta T
Rearranging the equation to solve for q per gram:
q/gram of the unknown = q/0.2086 g
Now, substituting the value of q obtained earlier (2.58678 kJ) and the mass of the unknown substance (0.2086 g):
q/gram of the unknown = 2.58678 kJ/0.2086 g
This gives you the value of q per gram of the unknown substance.