Question #22d95

1 Answer
Jun 9, 2017

Answer:

50 calories or 2,092 joules

Explanation:

For a pure condensed phase (i.e.; pure solid, pure liquid or pure gas phase substance ) the expression Q = mc#DeltaT# is used to calculate the quantity of heat associated with the specified #DeltaT# value given.
Q = Heat Quantity in calories or joules
m = mass (grams) of substance
c = specific heat = a constant that defines the amount of heat needed to raise one gram of substance by 1 degree celcius.
#DeltaT# = change in temperature

For 10 ml water ( = 10 grams water b/c 1 g = 1 ml) heated by #5^oC#
& #c=1.00 ("cal"/g^oC)#:

Q = mc#DeltaT# = (#10 g#) #xx#1.00 (#"cal"/g^oC"#)#xx# (#5^oC#) = #50 "calories"#
=> #50 calxx4.184"joules"/"cal"# = #2,029"joules"#