Asample of water is heated by 520 cal in the temperature rises by 10 k what is the mass of the water sample in grams?

52 g water

In this question we are given;

Amount of heat, Q = 520 calories

Change in temperature, K = 10 K

We are required to calculate the mass of water.

Amount of heat is calculated by multiplying mass by specific heat capacity by change in temperature.

Q = m × c × Δt

The specific heat capacity,c of water = 1 Cal/g°C or 4.184 J/g°C

Rearranging the formula;

m = Q ÷ cΔt

   = 520 Cal ÷ (1 Cal/g°C×10 K)

   = 52 g

Thus, the mass of water sample is 52 g

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.