Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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**Problem Statement:**

If you combine 290.0 mL of water at 25.00 °C and 110.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

\[ T_{\text{final}} = \] \[ \_\_\_\_ \] °C

---

**Explanation:**

To find the final temperature of the mixture, use the formula for the conservation of energy which considers the masses and specific heat capacities of the water samples:

\[ m_1 \cdot c \cdot (T_{\text{final}} - T_1) + m_2 \cdot c \cdot (T_{\text{final}} - T_2) = 0 \]

where:
- \( m_1 \) is the mass of the first water sample,
- \( m_2 \) is the mass of the second water sample,
- \( c \) is the specific heat capacity of water (approximately 4.18 J/g°C),
- \( T_1 \) and \( T_2 \) are the initial temperatures of the first and second water samples, respectively.

Since the density of water is 1.00 g/mL, the mass in grams is numerically equivalent to the volume in mL for each sample.
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Transcribed Image Text:**Problem Statement:** If you combine 290.0 mL of water at 25.00 °C and 110.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water. \[ T_{\text{final}} = \] \[ \_\_\_\_ \] °C --- **Explanation:** To find the final temperature of the mixture, use the formula for the conservation of energy which considers the masses and specific heat capacities of the water samples: \[ m_1 \cdot c \cdot (T_{\text{final}} - T_1) + m_2 \cdot c \cdot (T_{\text{final}} - T_2) = 0 \] where: - \( m_1 \) is the mass of the first water sample, - \( m_2 \) is the mass of the second water sample, - \( c \) is the specific heat capacity of water (approximately 4.18 J/g°C), - \( T_1 \) and \( T_2 \) are the initial temperatures of the first and second water samples, respectively. Since the density of water is 1.00 g/mL, the mass in grams is numerically equivalent to the volume in mL for each sample.
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