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Calculate the energy required to heat of 1.50 kg silver from -7.8 C to 15.0 C . Assume the specific heat capacity of silver under these conditions is .0235 J*g^-1*K^-1 . Be sure your answer has the correct number of significant digits.

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Answer:

804 J

Explanation:

Step 1: Given data

  • Mass of silver (m): 1.50 kg
  • Initial temperature: -7.8 °C
  • Final temperature: 15.0 °C
  • Specific heat capacity of silver (c): 0.0235J·g⁻¹K⁻¹

Step 2: Calculate the energy required (Q)

We will use the following expression.

Q = c × m × ΔT

Q = 0.0235J·g⁻¹K⁻¹ × (1.50 × 10³g) × [15.0°C-(-7.8°C)]

Q = 804 J