what is the specific heat of an unknown substance of 2000 j of energy required to raise the temperature of 4 grams of substances 5 degrees celsius

q = mass x specific heat x delta T.

q = 2000 J
mass = 4g
sp.h. solve for this
delta T = 5 degrees C.

To determine the specific heat of the unknown substance, you need to use the formula:

Q = mcΔT,

where:
Q is the heat energy absorbed (in joules),
m is the mass of the substance (in grams),
c is the specific heat capacity of the substance (in J/g°C), and
ΔT is the change in temperature (in °C).

In this case, you have:
Q = 2000 J,
m = 4 g,
ΔT = 5 °C.

Rearrange the formula to solve for c:

c = Q / (m * ΔT).

Substitute the known values into the equation:

c = 2000 J / (4 g * 5 °C).

Now, calculate the specific heat:

c = 2000 J / (20 g °C).

Simplify the units:

c = 100 J / (g °C).

Therefore, the specific heat of the unknown substance is 100 J/g°C.