Why does Gibbs free energy have to be negative?
The system's and its surroundings' overall entropy must rise for a reaction to occur on its own:
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For a spontaneous reaction to occur, the Gibbs free energy change (∆G) must be negative, indicating that the system moves towards a lower energy state. This is in accordance with the second law of thermodynamics, ensuring the system's tendency to increase overall entropy and stability.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
- 350g of 0.0°C ice cubes are placed in a glass of 700g of room temperature water (23.0°C) in an experiment. Later, the temperature of the water in the glass is measured at 13.0°C. Does all of the ice melt?
- If 5,100 joules of heat are given off when a sample of water freezes, what Is the mass of the water?
- The molar heat of fusion for water is 6.01 kJ/mol. How much energy is released when 36.8 g of water freezes at its freezing point?
- 900 kg water have T1 = -40 C, T2 = 0C and T3 = 5 C, How much energy is needed to melt this mass of water in 2 hours? Thank you so much.
- Why do exothermic reactions release heat?

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