A 30. mL sample of distilled water at 10ºC is added to a 50. mL sample of the same water at 50ºC in a coffee-cup calorimeter. The final temperature of the mixture is closest to30ºC10ºC20ºC60ºC

The final temperature of the mixture is closest to 30ºC

Explanation:

Step 1: Data given

Volume of sample 1 = 30 mL ≈ 30 grams

Temperature of sample 1 = 10 °C

Volume of sample 2 = 50 mL ≈ 50 grams

Temperature of sample 2 = 50 °C

Step 2: Calculate the final temperature

T (final) = (30 g * 10 °C + 50 g * 50 °C) / (50 g + 30 g)

T (final) = (300 + 2500) / 80

T (final) = 35 °C

The final temperature of the mixture is closest to30ºC