A cup of coffee of volume 0 3 L is heated from a temperature of 25oC to 60oC at a pressure of 100 kPa Determine the change in the (a) Internal energy (U) (b) Enthalpy (H) (c) Entropy (S) Assume the density () and specific heat of coffee to be 1100 kg m3 and 4 1 kJ kg K respectively Employ the SL mo...

Using the SL material model a The change in interna ...

A cup of coffee of volume 0.3 L is heated from a temperature of 25oC to 60oC

Question:

A cup of coffee of volume 0.3 L is heated from a temperature of 25oC to 60oC at a pressure of 100 kPa. Determine the change in the
(a) Internal energy (ΔU).
(b) Enthalpy (ΔH).
(c) Entropy (ΔS). Assume the density (ρ) and specific heat of coffee to be 1100 kg/m3 and 4.1 kJ/kg-K respectively. Employ the SL model.
(d) What-if Scenario: How would the answers change if the heating were done inside a chamber pressurized at 1 MPa? (1:increase; -1:decrease; 0:remain same)