How much heat is needed to raise the temperature of a 5.0 gram block of aluminum from 22.0°c to 37.0°c?

67.65 Joules

Explanation:

Q= heat gained

m= mass of the substance = 5.0 g

c = heat capacity of aluminium = 0.902 J/g ° C      

Q= 67.65 Joules

Thus heat gained by 5.0 g of aluminum is = 67.65 Joules

can you attach a picture of the lettuce? : )

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.