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The exterior walls of a house have a total area of 194 m² and are at 12.4°C and the surrounding air is at 7.4° C. Find the rate of convective cooling of the walls, assuming a convection coefficient of 2.9 W/(m²·°C). Since you're looking for the rate of cooling, your answer should be entered as positive.

#### Table of Latent Heat Values

The table below provides information on the latent heat required for phase transitions of water.

| **Substance** | **Latent Heat (J/kg)** |
|---------------|------------------------|
| Steam ⇔ Water | 2,260,000 |
| Ice ⇔ Water | 333,000 |

**Explanation:**

- **Substance**: This column lists the different phase transitions of water. "Steam ⇔ Water" refers to the transition between steam and liquid water, while "Ice ⇔ Water" refers to the transition between ice and liquid water.

- **Latent Heat (J/kg)**: This column indicates the amount of energy, measured in joules per kilogram (J/kg), required to change the phase of a given mass of substance without changing its temperature.

- For steam to water (or vice versa), the latent heat is 2,260,000 J/kg.
- For ice to water (or vice versa), the latent heat is 333,000 J/kg.

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