Answered

Welcome to Westonci.ca, where finding answers to your questions is made simple by our community of experts. Get accurate and detailed answers to your questions from a dedicated community of experts on our Q&A platform. Our platform provides a seamless experience for finding reliable answers from a network of experienced professionals.

How many kilograms of sour cream should be added (stirred into the water) to 0.5 litres of water at T=80°C to cool the water to 40°C, which is the ideal temperature for soup if the temperature of the sour cream (sour cream 20%) before it is added to the soup is 5°C?

Sagot :

onyebuchinnaji

The mass of the sour cream that should be added is 0.68 kg.

Mass of the water

Mass of the water is calculated as follows;

mass = density x volume

  • density of water = 1 kg/L

mass = (1 kg/L) x 0.5 L = 0.5 kg

Conservation of energy

Heat gained by the sour cream = Heat lost by the water

[tex]m_s c_s\Delta \theta _s = m_wc_w\Delta \theta _w\\\\m_s = \frac{m_wc_w\Delta \theta _w}{c_s\Delta \theta _s} \\\\[/tex]

where;

  • Cs is specific heat of sour cream
  • Cw is specific heat of water
  • Δθ is change in temperature

[tex]m_s = \frac{0.5 \times 4184 \times (80 - 40)}{3510 \times (40 - 5)} \\\\m_s = 0.68 \ kg[/tex]

Learn more about heat capacity here: https://brainly.com/question/16559442

We hope you found what you were looking for. Feel free to revisit us for more answers and updated information. Thanks for using our service. We're always here to provide accurate and up-to-date answers to all your queries. We're here to help at Westonci.ca. Keep visiting for the best answers to your questions.