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ā 8y agoFrozen (23F)
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ā 8y agoWhen the temperature of a sample of water is -5 degrees Celsius, the water is frozen and in a solid state.
No, if 1 kg of toluene melts at -95 degrees Celsius, the 500g sample would also need to reach the same temperature for melting to occur. It is unlikely for toluene to melt at 95 degrees Celsius in this scenario.
The temperature of the water is 100 degrees Celsius, the boiling point of water at standard pressure.
When a sample of water is heated past 100 degrees Celsius, it is past its boiling point. At this temperature, water changes from a liquid to a gas.
To find the mass of the iron sample, you need to know the specific heat capacity of iron. Given that the heat energy required to raise the temperature is 562 Joules, you can use the formula: heat energy = mass x specific heat capacity x temperature change. With the specific heat capacity of iron (0.45 J/gĀ°C), you can calculate the mass of the iron sample.
To find the unknown initial temperature of the second sample of water, you can use the principle of conservation of energy. The heat lost by the first sample as it cools down will be equal to the heat gained by the second sample as it warms up. The specific heat capacity of water is 4.184 J/gĀ°C. Just plug the values into the formula: (m_1c_1(T_f-T_1) = -m_2c_2(T_f-T_2)) where (m) is mass, (c) is specific heat, (T_f) is final temperature, and (T) is initial temperature.
The temperature must decrease by 275 degrees Celsius to reach the freezing point of helium at -272 degrees Celsius.
No, if 1 kg of toluene melts at -95 degrees Celsius, the 500g sample would also need to reach the same temperature for melting to occur. It is unlikely for toluene to melt at 95 degrees Celsius in this scenario.
The temperature of the water is 100 degrees Celsius, the boiling point of water at standard pressure.
When the temperature of a sample of water is -5 degrees Celsius, the water is in a solid state, as it is below the freezing point of water at 0 degrees Celsius. At this temperature, water molecules have slowed down and formed a crystalline structure, resulting in the solid state known as ice.
The temperature change in kelvins is the same as in degrees Celsius. So, the temperature change is 10 kelvins.
When a sample of water is heated past 100 degrees Celsius, it is past its boiling point. At this temperature, water changes from a liquid to a gas.
The temperature difference in Kelvin is the same as in Celsius. So, if the sample rises by 12 degrees Celsius, it also rises by 12 Kelvin.
To calculate the amount of ice water needed to cool the sample to 20 degrees Celsius, you would need the initial temperature of the sample, the mass of the sample, and the specific heat capacities of water and ice. With this information, you could use the equation q = m * c * ĪT to determine the quantity of ice water needed to cool the sample.
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No, pure water boils at 100 degrees Celsius at normal temperature and pressure. The fact that the water boiled at 102 degrees Celsius indicates that it may not be pure and could contain impurities or dissolved substances.
Adding salt to water lowers the temperature at which water freezes from 0 degrees Celsius to several degrees colder than that (depending on how much salt is added). Practically what that means is that a sample of pure water at -1 degrees Celsius will be frozen solid, but a sample of salt water at the same temperature will remain liquid since its freezing point is lower that.
Depending on the pressure, it can be in any of these phases.