Question

Please do both 6 & 7 they are together

Thanks!

10 g of water is melted at it normal melting point. Please label the below diagram with: system, surroundings, and direction of heat flow. Please calculate the amount of heat flow for the process above and the entropy change of the surroundings if the surroundings are at 0 degreeC. 7. What is the entropy change of the Universe for the process described in problem #6. How do you know?

Answer 1

6.

Amount of Heat flow, q=mc_pdT

m is mass, c is specific heat capacity of water which is 1 cal/g, dT is change in temperature

Consider initial temperature to be -10^oC i.e. 263 K

Hence, q=10$\times$1$\times$(273-263)

q=100 cal

entropy change, $\Delta S=q/\Delta T$

$\Delta S=100/10$

$\Delta S=10$ cal/K