You find a 1979 copper penny (and note that pre-1982 pennies are pure copper) in the snow and pick it up. how much heat does the penny absorb as it warms from the temperature of the snow, −5.0∘c to the temperature of your body, 37∘c? assume the penny is pure copper and has a mass of 3.10 g. (the specific heat capacity of copper is 0.385 j/(g⋅∘

The penny absorbs 50 J.

q = mcΔT

ΔT = T_f – T_i = 37 °C – (-5.0 °C) = 42 °C

q = 3.10 g × 0.385 J·°C⁻¹g⁻¹ × 42 °C = 50 J

Note: The answer can have only two significant figures because that is all you gave for the temperature of your body.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.