Question

Calculate how much heat is released when 500g of platinum is cooled from 250.0K to 240.0K

Answer 1

Q = 665 J

Step-by-step explanation:

Given:

m = 500 g = 0.5 kg

T₁ = 250.0 K

T₂ = 240.0 K

c = 133 J / ( kg*⁰K) - Specific heat capacity of platinum

___________

Q - ?

Heat is released:

Q = c*m*( T₁ - T₂) = 133*0.5*(250.0 - 240.0) =

= 133*0.5*10 ≈ 665 J

Answer 2

Q= heat
m= mass
C= specific heat
AT- change in temperature (final minus initial)

Q=mCA(delta)T
Q=500g(0.133J/g*C)(-10*C)
Q= -655 J