A 250 grams sample of an unknown substance was heated from 35 degree Celsius to 50 degree Celsius. The substance absorbed 7,454 J of energy. What is the specific heat of the substance? Identify if the reaction is exothermic or endothermic

Specific heat capacity, c = 1.99J/g°C. The reaction is endothermic because heat is being absorbed.

Explanation:

Given the following data;

Mass = 250g

Original temperature, T1 = 35°C

New temperature, T2 = 50°C

Quantity of heat = 7454J

To find the specific heat capacity;

Heat capacity is given by the formula;

Where;

Q represents the heat capacity or quantity of heat.

dt = T2 - T1

dt = 50 - 35

dt = 15°C

Making "c" the subject of formula, we have;

Substituting the values into the equation, we have;

Specific heat capacity, c = 1.99J/g°C.

Therefore, the reaction is endothermic because heat is being absorbed (initial temperature is lower than the final temperature).

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

b. examine and describe cells