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Ep) Circle the ds equation(s) which is valid for any substance under any process: d s=\frac{d u}{T}+p \frac{d y}{T} d s=c \frac{d T}{T} d s=c_{v} \frac{d T}{T}+R \frac{d v}{v} d

s=\frac{d h}{T}+v \frac{d p}{T} \text { e) } d s=c_{p} \frac{d T}{T}-R \frac{d p}{p}

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