EATS1010ASSIGN1ANS2

# EATS1010ASSIGN1ANS2 - ANSWER KEY PPchainSo Question 1(15 marks a What is the energy released in a single reaction where four protons one He

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ANSWER KEY PPchainSo Question 1 (15 marks) a. What is the energy released in a single reaction where four protons one He nucleus? (4 mark) The energy released in a single reaction where four protons one He nucleus can be calculated using E = mc 2 where m is the mass loss and c is the speed of light 2.998 × 10 8 m / s ( ) . 1 a.m.u=1.66 × 10 -27 kg NOTE : using the "mks" system (meters, kilograms seconds) Mass of 4 protons = 1.008a.m.u × 4 protons = 4.032 amu Mass of 1 helium-4 nucleus=4.003a.m.u Now to calculate E; (m = 0.029 amu × 1.66 × 10 -27 kg amu = 4.814 × 10 29 kg )'____. ...... (2 mark ) E= 4.814 × 10 29 kg ( ) × (2.998 × 10 8 m / s ) 2 = 4.327 × 10 12 J .................................... (1.5 mark ) 4.327 × 10 12 J is released in a single reaction where four protons one He nucleus (.5 mark ) b. What is the power output of Sun? (3 mark) The Power output of the sun is given by P= Number of reactions per second ( ) × Energy released per reaction

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## This note was uploaded on 01/23/2011 for the course EATS 1010 taught by Professor Ross during the Fall '10 term at York University.

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EATS1010ASSIGN1ANS2 - ANSWER KEY PPchainSo Question 1(15 marks a What is the energy released in a single reaction where four protons one He

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