How much heat energy is required to raise the temperature of 15g of silver from 25°C to 55°C, assuming the specific heat of silver is 0.24 J/gºC?
30
108
15 J
115 J

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The internal energy of the system we can term it as total potential energy and kinetic energy. energy flows out of the surrounding from the system then we can say that the internal energy of the final state is lower than its initials. the sign of  δesystem is negative.δesystem = efinal - einitial=-ve  efinal  ∠einitial.

2520 = (10000)c (70-10) 0.00420 j/(gi°c)

No one can answer this im sorry