Can you calculate the energy needed to increase the temperature of 100kg of iron by 40°C?

177600 J or 177.6kJ

Explanation:

For this problem, we need to use q = mcAT

we have m = 10000, and AT= 40. The specific heat of iron is 0.444.

So now we can plug it in: q = 10000*.444*40 = 177600 J or 177.6kJ

1848000J

Explanation:

Given parameters:

Mass of iron  = 100kg

Temperature change  = 40°C

Unknown:

Energy needed to increase the temperature  = ?

Solution:

The amount of energy needed is given by the expression below:

     H  = m C Δt

m is the mass

c is the specific heat capacity

Δt is the change in temperature

  c for iron is 462J/kg°C

 Now insert the parameters and solve;

  H  = 100 x 462 x 40  = 1848000J

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.