A solution was formed by combining 25.0g of solid A with 60.0ml of distilled water, with the water initially at 21.4* C. The final temperature of the solution was 25.3* C. Calculate the heat released as the solid dissolved, q soln, assuming no heat loss to the calorimeter.

it's c (engineer's do their work with mechanical stuff not on any living being)

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.

im doing test rn im going with 2 but ill give answer if itss wrong,   : )