You have 8g of water at 23°C. You start heating it up.  The temperature increases to 35°C.  How much energy was added?

You have 24g of water at 22°C. You add 6,000 J of energy. How do you expect the temperature to change?

You add 400 J of energy to 12g of iron, and its temperature increases by 50°C.  You add 400 J of energy to 12g of aluminum, and its temperature increases by 24°C.  What can you say about aluminum's "specific heat capacity" compared to iron?