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## Main Question or Discussion Point

How do I work out the rate of heat transfer between different states of matter? Say for example I wanted to calculate how long it takes for a freezer at -15 degrees to freeze 30g of water in a cup at 10 degrees, what equations would I need to use?

I've already worked out that 11,274 joules needs to be extracted from the water.

I've already worked out that 11,274 joules needs to be extracted from the water.

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