7. An 800g aluminium block cools from 70 °C to 25 °C.
a) Given that the specific heat capacity of aluminium is 0.902 Jg='°C ', calculate the heat released
b) Calculate the heat capacity of the aluminium block

Theoretical temperature at which molecules stop moving and no more heat can be removed from the object. kelvin: absolute zero degrees. none of the above.

Hello,#agreed with joseph002.i got my source also from  source: hope this

Answer/when the cell uses energy;

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m