Ablock of iron (mass: 10 kg, density: 7840 kg/m3; c_v: 0.45 kj/kg) is initially at 100 kpa and 30 deg-c. because of external heating, its entropy increases by 5 kj/k. determine the final temperature (in deg-c) of the iron block. use the sl model

1.250 × 10¹¹ J

Explanation:

Step 1: Given and required data

Step 2: Calculate the energy required to move the object

The energy required to move the object from the Earth's surface to an altitude twice the Earth's radius is equal to the change in the gravitational potential energy (G) between both levels. We will use the following expression.

E = G₂ - G₁

E = m × g × h₂ - m × g × h₁

where h is the altitude (h₁ = 0)

E = m × g × h₂

E = 1000 kg × 9.807 m/s² × 2 × 6.371 × 10⁶ m

E = 1.250 × 10¹¹ J