Calculate the change in internal energy of a block of copper of mass `200g` when it is heated from `25^(@)C t o 75^@C`. Given specific heat of copper `= 0.1 cal. g^(-1) .^(@)C^(-1)` and assume that change in volume is negligible.

Explanation

To calculate the change in internal energy of a block of copper when it is heated, we can follow these steps:

### Step 1: Identify the given values
- Mass of copper block (m) = 200 g
- Initial temperature (T1) = 25°C
- Final temperature (T2) = 75°C
- Specific heat of copper (C) = 0.1 cal/g°C

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