gcse physics question - 6 marks (specific heat capacity + specific latent heat)
The initial temperature of the mixture was +20 °C.
The mixture froze at –1.5 °C.
A total of 165 kJ of internal energy was transferred from the mixture to cool and freeze it.
specific heat capacity of the mixture = 3500 J/kg °C
specific latent heat of fusion of the mixture = 255 000 J/kg
Calculate the mass of the mixture.
Give your answer to 2 significant figures
The mixture froze at –1.5 °C.
A total of 165 kJ of internal energy was transferred from the mixture to cool and freeze it.
specific heat capacity of the mixture = 3500 J/kg °C
specific latent heat of fusion of the mixture = 255 000 J/kg
Calculate the mass of the mixture.
Give your answer to 2 significant figures
What equations do you think you should use?
Original post by Hellllpppp
What equations do you think you should use?
energy = mass X specific heat capacity X temp change
but also energy = mass X latent heat ??
Original post by hycksfltr
energy = mass X specific heat capacity X temp change
but also energy = mass X latent heat ??
but also energy = mass X latent heat ??
Yeah perfect now substitute the values you have. Remember to convert so you have the correct units where appropriate.
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