Question

how much energy must be released by 50.0 g of steam to decrease its temperature from 125.0 degrees Celsius to 100.0 degrees Celsius ?

Answer 1

5250 Joules

Step-by-step explanation:

Mass = 50g

Initial Temperature = 125.0 degrees Celsius

Final Temperature = 100 degrees Celsius

Temperature change = Final - Initial = 100 - 125 = -25

Heat = ?

These quantities are related by the equation;

H = mCΔT

where c = specific hear capacity = 4.2 J/g°C

H = 50 * 4.2 * (-25)

H = -5250 J (The negative sign is because heat is being released)