A 155g sample of an unknown substance was; heated from 25.0°c to 40°c. In the process, the substance absorbed 2085 J of energy. What is the specific heat of the substance?

0.897 J/g°C

Explanation:

Step 1:

Data obtained from the question. This includes the following:

Mass (M) of substance = 155g

Initial temperature (T1) = 25.0°C

Final temperature (T2) = 40°C

Change is temperature (ΔT) = T2 – T1 = 40°C – 25.0°C = 15°C

Heat Absorbed (Q) = 2085 J

Specific heat capacity (C) of the substance =?

Step 2:

Determination of the specify heat capacity of the substance.

Applying the equation: Q = MCΔT, the specific heat capacity of the substance can be obtained as follow:

Q = MCΔT

C = Q/MΔT

C = 2085 / (155 x 15)

C = 0.897 J/g°C

Therefore, the specific heat capacity of the substance is 0.897 J/g°C

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.