Need Assistance with Thermodynamics Question

by


Hey everyone! 

I’m currently struggling with a thermodynamics problem related to entropy and heat transfer. The question is:

“A 2kg block of copper (c = 0.385 kJ/kg·K) is heated from 25°C to 150°C. Calculate the entropy change of the copper block.”

I know the formula for entropy change: 

ΔS=m⋅c⋅ln⁡T2T1\Delta S = m \cdot c \cdot \ln \frac{T_2}{T_1}ΔS=m⋅c⋅lnT1​T2​​

But I’m getting conflicting answers. Can anyone confirm the correct steps or point out where I might be going wrong? Thanks in advance! ????

P.S.: If you have similar problems or have great resources on thermodynamics, please share with block blast!