A small mass m of cold water whose temperature is 0c is, Ask an Expert

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a small mass m of cold water whose temperature is 0C is poured into a lake whose temperature is 10C. the initially cold water is warmed until temperature reaches 10C; the lake is so large that its temperature change is negligible.

a) what is the change of entropy for this system?

b) is entropy greater or less than zero? is this process reversible or irreversible? please show work for good review.

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